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--- dyld/dyld-957/other-tools/dyld_shared_cache_util.cpp
+++ /dev/null
@@ -1,2285 +0,0 @@
-/* -*- mode: C++; c-basic-offset: 4; tab-width: 4 -*-
- *
- * Copyright (c) 2009-2012 Apple Inc. All rights reserved.
- *
- * @APPLE_LICENSE_HEADER_START@
- *
- * This file contains Original Code and/or Modifications of Original Code
- * as defined in and that are subject to the Apple Public Source License
- * Version 2.0 (the 'License'). You may not use this file except in
- * compliance with the License. Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this
- * file.
- *
- * The Original Code and all software distributed under the License are
- * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- * Please see the License for the specific language governing rights and
- * limitations under the License.
- *
- * @APPLE_LICENSE_HEADER_END@
- */
-
-#include <stdio.h>
-#include <unistd.h>
-#include <sys/stat.h>
-#include <string.h>
-#include <dlfcn.h>
-#include <fcntl.h>
-#include <stdlib.h>
-#include <errno.h>
-#include <sys/mman.h>
-#include <sys/syslimits.h>
-#include <mach-o/arch.h>
-#include <mach-o/nlist.h>
-#include <mach-o/loader.h>
-#include <mach-o/nlist.h>
-#include <mach-o/dyld_priv.h>
-#include <bootstrap.h>
-#include <mach/mach.h>
-#include <dispatch/dispatch.h>
-#include <uuid/uuid.h>
-
-#include <TargetConditionals.h>
-
-#include <map>
-#include <vector>
-#include <iostream>
-#include <optional>
-
-//#include "ClosureBuilder.h"
-#include "DyldSharedCache.h"
-#include "JSONWriter.h"
-#include "Trie.hpp"
-#include "dsc_extractor.h"
-#include "dyld_introspection.h"
-#include "OptimizerSwift.h"
-
-#include "PrebuiltLoader.h"
-#include "DyldProcessConfig.h"
-#include "DyldRuntimeState.h"
-
-#include "objc-shared-cache.h"
-#include "OptimizerObjC.h"
-
-using namespace dyld4;
-
-#if TARGET_OS_OSX
-#define DSC_BUNDLE_REL_PATH "../../lib/dsc_extractor.bundle"
-#else
-#define DSC_BUNDLE_REL_PATH "../lib/dsc_extractor.bundle"
-#endif
-
-// In newer shared caches, relative method list selectors are offsets from the magic selector in libobjc
-static uint64_t getSharedCacheRelativeSelectorBaseVMAddress(const DyldSharedCache* dyldCache, bool rebased)
-{
- __block uint64_t sharedCacheRelativeSelectorBaseVMAddress = 0;
- if ( dyldCache->header.mappingOffset >= __offsetof(dyld_cache_header, symbolFileUUID) ) {
- constexpr std::string_view magicSelector = "\xf0\x9f\xa4\xaf";
- dyld3::MachOAnalyzer::VMAddrConverter vmAddrConverter = dyldCache->makeVMAddrConverter(rebased);
- dyldCache->forEachImage(^(const mach_header *mh, const char *installName) {
- if ( !strcmp(installName, "/usr/lib/libobjc.A.dylib") ) {
- const dyld3::MachOAnalyzer* ma = (const dyld3::MachOAnalyzer*)mh;
- uintptr_t slide = ma->getSlide();
- Diagnostics diag;
- ma->forEachObjCSelectorReference(diag, vmAddrConverter,
- ^(uint64_t selRefVMAddr, uint64_t selRefTargetVMAddr, bool &stop) {
- const char* selString = (const char*)selRefTargetVMAddr + slide;
- if ( selString == magicSelector ) {
- sharedCacheRelativeSelectorBaseVMAddress = selRefTargetVMAddr;
- }
- });
- }
- });
- }
- return sharedCacheRelativeSelectorBaseVMAddress;
-}
-
-enum Mode {
- modeNone,
- modeList,
- modeMap,
- modeDependencies,
- modeSlideInfo,
- modeVerboseSlideInfo,
- modeTextInfo,
- modeLinkEdit,
- modeLocalSymbols,
- modeJSONMap,
- modeJSONDependents,
- modeSectionSizes,
- modeStrings,
- modeInfo,
- modeSize,
- modeObjCInfo,
- modeObjCProtocols,
- modeObjCImpCaches,
- modeObjCClasses,
- modeObjCSelectors,
- modeSwiftProtocolConformances,
- modeExtract,
- modePatchTable,
- modeListDylibsWithSection
-};
-
-struct Options {
- Mode mode;
- const char* dependentsOfPath;
- const char* extractionDir;
- const char* segmentName;
- const char* sectionName;
- const char* rootPath = nullptr;
- bool printUUIDs;
- bool printVMAddrs;
- bool printDylibVersions;
- bool printInodes;
-};
-
-
-static void usage() {
- fprintf(stderr, "Usage: dyld_shared_cache_util -list [ -uuid ] [-vmaddr] | -dependents <dylib-path> [ -versions ] | -linkedit | -map | -slide_info | -verbose_slide_info | -info | -extract <dylib-dir> [ shared-cache-file ] \n");
-}
-
-static void checkMode(Mode mode) {
- if ( mode != modeNone ) {
- fprintf(stderr, "Error: select one of: -list, -dependents, -info, -slide_info, -verbose_slide_info, -linkedit, -map, -extract, or -size\n");
- usage();
- exit(1);
- }
-}
-
-struct SegmentInfo
-{
- uint64_t vmAddr;
- uint64_t vmSize;
- const char* installName;
- const char* segName;
-};
-
-static void buildSegmentInfo(const DyldSharedCache* dyldCache, std::vector<SegmentInfo>& segInfos)
-{
- dyldCache->forEachImage(^(const mach_header* mh, const char* installName) {
- dyld3::MachOAnalyzer* ma = (dyld3::MachOAnalyzer*)mh;
- ma->forEachSegment(^(const dyld3::MachOAnalyzer::SegmentInfo& info, bool& stop) {
- // Note, we subtract 1 from the vmSize so that lower_bound doesn't include the end of the segment
- // as being a match for a given address.
- segInfos.push_back({info.vmAddr, info.vmSize - 1, installName, info.segName});
- });
- });
-
- std::sort(segInfos.begin(), segInfos.end(), [](const SegmentInfo& l, const SegmentInfo& r) -> bool {
- return l.vmAddr < r.vmAddr;
- });
-}
-
-static void printSlideInfoForDataRegion(const DyldSharedCache* dyldCache, uint64_t dataStartAddress, uint64_t dataSize,
- const uint8_t* dataPagesStart,
- const dyld_cache_slide_info* slideInfoHeader, bool verboseSlideInfo) {
-
- printf("slide info version=%d\n", slideInfoHeader->version);
- if ( slideInfoHeader->version == 1 ) {
- printf("toc_count=%d, data page count=%lld\n", slideInfoHeader->toc_count, dataSize/4096);
- const dyld_cache_slide_info_entry* entries = (dyld_cache_slide_info_entry*)((char*)slideInfoHeader + slideInfoHeader->entries_offset);
- const uint16_t* tocs = (uint16_t*)((char*)slideInfoHeader + slideInfoHeader->toc_offset);
- for(int i=0; i < slideInfoHeader->toc_count; ++i) {
- printf("0x%08llX: [% 5d,% 5d] ", dataStartAddress + i*4096, i, tocs[i]);
- const dyld_cache_slide_info_entry* entry = &entries[tocs[i]];
- for(int j=0; j < slideInfoHeader->entries_size; ++j)
- printf("%02X", entry->bits[j]);
- printf("\n");
- }
- }
- else if ( slideInfoHeader->version == 2 ) {
- const dyld_cache_slide_info2* slideInfo = (dyld_cache_slide_info2*)(slideInfoHeader);
- printf("page_size=%d\n", slideInfo->page_size);
- printf("delta_mask=0x%016llX\n", slideInfo->delta_mask);
- printf("value_add=0x%016llX\n", slideInfo->value_add);
- printf("page_starts_count=%d, page_extras_count=%d\n", slideInfo->page_starts_count, slideInfo->page_extras_count);
- const uint16_t* starts = (uint16_t* )((char*)slideInfo + slideInfo->page_starts_offset);
- const uint16_t* extras = (uint16_t* )((char*)slideInfo + slideInfo->page_extras_offset);
- for (int i=0; i < slideInfo->page_starts_count; ++i) {
- const uint16_t start = starts[i];
- auto rebaseChain = [&](uint8_t* pageContent, uint16_t startOffset)
- {
- uintptr_t slideAmount = 0;
- const uintptr_t deltaMask = (uintptr_t)(slideInfo->delta_mask);
- const uintptr_t valueMask = ~deltaMask;
- const uintptr_t valueAdd = (uintptr_t)(slideInfo->value_add);
- const unsigned deltaShift = __builtin_ctzll(deltaMask) - 2;
-
- uint32_t pageOffset = startOffset;
- uint32_t delta = 1;
- while ( delta != 0 ) {
- uint8_t* loc = pageContent + pageOffset;
- uintptr_t rawValue = *((uintptr_t*)loc);
- delta = (uint32_t)((rawValue & deltaMask) >> deltaShift);
- uintptr_t value = (rawValue & valueMask);
- if ( value != 0 ) {
- value += valueAdd;
- value += slideAmount;
- }
- printf(" [% 5d + 0x%04llX]: 0x%016llX = 0x%016llX\n", i, (uint64_t)(pageOffset), (uint64_t)rawValue, (uint64_t)value);
- pageOffset += delta;
- }
- };
- if ( start == DYLD_CACHE_SLIDE_PAGE_ATTR_NO_REBASE ) {
- printf("page[% 5d]: no rebasing\n", i);
- }
- else if ( start & DYLD_CACHE_SLIDE_PAGE_ATTR_EXTRA ) {
- printf("page[% 5d]: ", i);
- int j=(start & 0x3FFF);
- bool done = false;
- do {
- uint16_t aStart = extras[j];
- printf("start=0x%04X ", aStart & 0x3FFF);
- if ( verboseSlideInfo ) {
- uint8_t* page = (uint8_t*)(long)(dataPagesStart + (slideInfo->page_size*i));
- uint16_t pageStartOffset = (aStart & 0x3FFF)*4;
- rebaseChain(page, pageStartOffset);
- }
- done = (extras[j] & DYLD_CACHE_SLIDE_PAGE_ATTR_END);
- ++j;
- } while ( !done );
- printf("\n");
- }
- else {
- printf("page[% 5d]: start=0x%04X\n", i, starts[i]);
- if ( verboseSlideInfo ) {
- uint8_t* page = (uint8_t*)(long)(dataPagesStart + (slideInfo->page_size*i));
- uint16_t pageStartOffset = start*4;
- rebaseChain(page, pageStartOffset);
- }
- }
- }
- }
- else if ( slideInfoHeader->version == 3 ) {
- const dyld_cache_slide_info3* slideInfo = (dyld_cache_slide_info3*)(slideInfoHeader);
- printf("page_size=%d\n", slideInfo->page_size);
- printf("page_starts_count=%d\n", slideInfo->page_starts_count);
- printf("auth_value_add=0x%016llX\n", slideInfo->auth_value_add);
- const uintptr_t authValueAdd = (uintptr_t)(slideInfo->auth_value_add);
- for (int i=0; i < slideInfo->page_starts_count; ++i) {
- uint16_t delta = slideInfo->page_starts[i];
- if ( delta == DYLD_CACHE_SLIDE_V3_PAGE_ATTR_NO_REBASE ) {
- printf("page[% 5d]: no rebasing\n", i);
- continue;
- }
-
- printf("page[% 5d]: start=0x%04X\n", i, delta);
- if ( !verboseSlideInfo )
- continue;
-
- delta = delta/sizeof(uint64_t); // initial offset is byte based
- const uint8_t* pageStart = dataPagesStart + (i * slideInfo->page_size);
- const dyld_cache_slide_pointer3* loc = (dyld_cache_slide_pointer3*)pageStart;
- do {
- loc += delta;
- delta = loc->plain.offsetToNextPointer;
- dyld3::MachOLoaded::ChainedFixupPointerOnDisk ptr;
- ptr.raw64 = *((uint64_t*)loc);
- if ( loc->auth.authenticated ) {
- uint64_t target = authValueAdd + loc->auth.offsetFromSharedCacheBase;
- uint64_t targetValue = target;
-#if __has_feature(ptrauth_calls)
- targetValue = ptr.arm64e.signPointer((void*)loc, target);
-#endif
- printf(" [% 5d + 0x%04llX]: 0x%016llX (JOP: diversity %d, address %s, %s)\n",
- i, (uint64_t)((const uint8_t*)loc - pageStart), targetValue,
- ptr.arm64e.authBind.diversity, ptr.arm64e.authBind.addrDiv ? "true" : "false",
- ptr.arm64e.keyName());
- }
- else {
- uint64_t targetValue = ptr.arm64e.unpackTarget();
- printf(" [% 5d + 0x%04llX]: 0x%016llX\n", i, (uint64_t)((const uint8_t*)loc - pageStart), targetValue);
- }
- } while (delta != 0);
- }
- }
- else if ( slideInfoHeader->version == 4 ) {
- const dyld_cache_slide_info4* slideInfo = (dyld_cache_slide_info4*)(slideInfoHeader);
- printf("page_size=%d\n", slideInfo->page_size);
- printf("delta_mask=0x%016llX\n", slideInfo->delta_mask);
- printf("value_add=0x%016llX\n", slideInfo->value_add);
- printf("page_starts_count=%d, page_extras_count=%d\n", slideInfo->page_starts_count, slideInfo->page_extras_count);
- const uint16_t* starts = (uint16_t* )((char*)slideInfo + slideInfo->page_starts_offset);
- const uint16_t* extras = (uint16_t* )((char*)slideInfo + slideInfo->page_extras_offset);
- for (int i=0; i < slideInfo->page_starts_count; ++i) {
- const uint16_t start = starts[i];
- auto rebaseChainV4 = [&](uint8_t* pageContent, uint16_t startOffset)
- {
- uintptr_t slideAmount = 0;
- const uintptr_t deltaMask = (uintptr_t)(slideInfo->delta_mask);
- const uintptr_t valueMask = ~deltaMask;
- const uintptr_t valueAdd = (uintptr_t)(slideInfo->value_add);
- const unsigned deltaShift = __builtin_ctzll(deltaMask) - 2;
-
- uint32_t pageOffset = startOffset;
- uint32_t delta = 1;
- while ( delta != 0 ) {
- uint8_t* loc = pageContent + pageOffset;
- uint32_t rawValue = *((uint32_t*)loc);
- delta = (uint32_t)((rawValue & deltaMask) >> deltaShift);
- uintptr_t value = (rawValue & valueMask);
- if ( (value & 0xFFFF8000) == 0 ) {
- // small positive non-pointer, use as-is
- }
- else if ( (value & 0x3FFF8000) == 0x3FFF8000 ) {
- // small negative non-pointer
- value |= 0xC0000000;
- }
- else {
- value += valueAdd;
- value += slideAmount;
- }
- printf(" [% 5d + 0x%04X]: 0x%08X\n", i, pageOffset, rawValue);
- pageOffset += delta;
- }
- };
- if ( start == DYLD_CACHE_SLIDE4_PAGE_NO_REBASE ) {
- printf("page[% 5d]: no rebasing\n", i);
- }
- else if ( start & DYLD_CACHE_SLIDE4_PAGE_USE_EXTRA ) {
- printf("page[% 5d]: ", i);
- int j=(start & DYLD_CACHE_SLIDE4_PAGE_INDEX);
- bool done = false;
- do {
- uint16_t aStart = extras[j];
- printf("start=0x%04X ", aStart & DYLD_CACHE_SLIDE4_PAGE_INDEX);
- if ( verboseSlideInfo ) {
- uint8_t* page = (uint8_t*)(long)(dataPagesStart + (slideInfo->page_size*i));
- uint16_t pageStartOffset = (aStart & DYLD_CACHE_SLIDE4_PAGE_INDEX)*4;
- rebaseChainV4(page, pageStartOffset);
- }
- done = (extras[j] & DYLD_CACHE_SLIDE4_PAGE_EXTRA_END);
- ++j;
- } while ( !done );
- printf("\n");
- }
- else {
- printf("page[% 5d]: start=0x%04X\n", i, starts[i]);
- if ( verboseSlideInfo ) {
- uint8_t* page = (uint8_t*)(long)(dataPagesStart + (slideInfo->page_size*i));
- uint16_t pageStartOffset = start*4;
- rebaseChainV4(page, pageStartOffset);
- }
- }
- }
- }
-}
-
-
-static void findImageAndSegment(const DyldSharedCache* dyldCache, const std::vector<SegmentInfo>& segInfos, uint64_t cacheOffset, SegmentInfo* found)
-{
- const uint64_t locVmAddr = dyldCache->unslidLoadAddress() + cacheOffset;
- const SegmentInfo target = { locVmAddr, 0, NULL, NULL };
- const auto lowIt = std::lower_bound(segInfos.begin(), segInfos.end(), target,
- [](const SegmentInfo& l, const SegmentInfo& r) -> bool {
- return l.vmAddr+l.vmSize < r.vmAddr+r.vmSize;
- });
- *found = *lowIt;
-}
-
-
-int main (int argc, const char* argv[]) {
-
- const char* sharedCachePath = nullptr;
-
- Options options;
- options.mode = modeNone;
- options.printUUIDs = false;
- options.printVMAddrs = false;
- options.printDylibVersions = false;
- options.printInodes = false;
- options.dependentsOfPath = NULL;
- options.extractionDir = NULL;
-
- bool printStrings = false;
- bool printExports = false;
-
- for (uint32_t i = 1; i < argc; i++) {
- const char* opt = argv[i];
- if (opt[0] == '-') {
- if (strcmp(opt, "-list") == 0) {
- checkMode(options.mode);
- options.mode = modeList;
- }
- else if (strcmp(opt, "-dependents") == 0) {
- checkMode(options.mode);
- options.mode = modeDependencies;
- options.dependentsOfPath = argv[++i];
- if ( i >= argc ) {
- fprintf(stderr, "Error: option -depdendents requires an argument\n");
- usage();
- exit(1);
- }
- }
- else if (strcmp(opt, "-linkedit") == 0) {
- checkMode(options.mode);
- options.mode = modeLinkEdit;
- }
- else if (strcmp(opt, "-info") == 0) {
- checkMode(options.mode);
- options.mode = modeInfo;
- }
- else if (strcmp(opt, "-slide_info") == 0) {
- checkMode(options.mode);
- options.mode = modeSlideInfo;
- }
- else if (strcmp(opt, "-verbose_slide_info") == 0) {
- checkMode(options.mode);
- options.mode = modeVerboseSlideInfo;
- }
- else if (strcmp(opt, "-text_info") == 0) {
- checkMode(options.mode);
- options.mode = modeTextInfo;
- }
- else if (strcmp(opt, "-local_symbols") == 0) {
- checkMode(options.mode);
- options.mode = modeLocalSymbols;
- }
- else if (strcmp(opt, "-strings") == 0) {
- if (options.mode != modeStrings)
- checkMode(options.mode);
- options.mode = modeStrings;
- printStrings = true;
- }
- else if (strcmp(opt, "-sections") == 0) {
- checkMode(options.mode);
- options.mode = modeSectionSizes;
- }
- else if (strcmp(opt, "-exports") == 0) {
- if (options.mode != modeStrings)
- checkMode(options.mode);
- options.mode = modeStrings;
- printExports = true;
- }
- else if (strcmp(opt, "-map") == 0) {
- checkMode(options.mode);
- options.mode = modeMap;
- }
- else if (strcmp(opt, "-json-map") == 0) {
- checkMode(options.mode);
- options.mode = modeJSONMap;
- }
- else if (strcmp(opt, "-json-dependents") == 0) {
- checkMode(options.mode);
- options.mode = modeJSONDependents;
- }
- else if (strcmp(opt, "-size") == 0) {
- checkMode(options.mode);
- options.mode = modeSize;
- }
- else if (strcmp(opt, "-objc-info") == 0) {
- checkMode(options.mode);
- options.mode = modeObjCInfo;
- }
- else if (strcmp(opt, "-objc-protocols") == 0) {
- checkMode(options.mode);
- options.mode = modeObjCProtocols;
- }
- else if (strcmp(opt, "-objc-imp-caches") == 0) {
- checkMode(options.mode);
- options.mode = modeObjCImpCaches;
- }
- else if (strcmp(opt, "-objc-classes") == 0) {
- checkMode(options.mode);
- options.mode = modeObjCClasses;
- }
- else if (strcmp(opt, "-objc-selectors") == 0) {
- checkMode(options.mode);
- options.mode = modeObjCSelectors;
- }
- else if (strcmp(opt, "-fs-root") == 0) {
- options.rootPath = argv[++i];
- }
- else if (strcmp(opt, "-swift-proto") == 0) {
- checkMode(options.mode);
- options.mode = modeSwiftProtocolConformances;
- }
- else if (strcmp(opt, "-extract") == 0) {
- checkMode(options.mode);
- options.mode = modeExtract;
- options.extractionDir = argv[++i];
- if ( i >= argc ) {
- fprintf(stderr, "Error: option -extract requires a directory argument\n");
- usage();
- exit(1);
- }
- }
- else if (strcmp(opt, "-uuid") == 0) {
- options.printUUIDs = true;
- }
- else if (strcmp(opt, "-inode") == 0) {
- options.printInodes = true;
- }
- else if (strcmp(opt, "-versions") == 0) {
- options.printDylibVersions = true;
- }
- else if (strcmp(opt, "-vmaddr") == 0) {
- options.printVMAddrs = true;
- }
- else if (strcmp(opt, "-patch_table") == 0) {
- options.mode = modePatchTable;
- }
- else if (strcmp(opt, "-list_dylibs_with_section") == 0) {
- options.mode = modeListDylibsWithSection;
- options.segmentName = argv[++i];
- options.sectionName = argv[++i];
- if ( i >= argc ) {
- fprintf(stderr, "Error: option -list_dylibs_with_section requires a segment and section name\n");
- usage();
- exit(1);
- }
- }
- else {
- fprintf(stderr, "Error: unrecognized option %s\n", opt);
- usage();
- exit(1);
- }
- }
- else {
- sharedCachePath = opt;
- }
- }
-
- if ( options.mode == modeNone ) {
- fprintf(stderr, "Error: select one of -list, -dependents, -info, -linkedit, or -map\n");
- usage();
- exit(1);
- }
-
- if ( options.mode != modeSlideInfo && options.mode != modeVerboseSlideInfo ) {
- if ( options.printUUIDs && (options.mode != modeList) )
- fprintf(stderr, "Warning: -uuid option ignored outside of -list mode\n");
-
- if ( options.printVMAddrs && (options.mode != modeList) )
- fprintf(stderr, "Warning: -vmaddr option ignored outside of -list mode\n");
-
- if ( options.printDylibVersions && (options.mode != modeDependencies) )
- fprintf(stderr, "Warning: -versions option ignored outside of -dependents mode\n");
-
- if ( (options.mode == modeDependencies) && (options.dependentsOfPath == NULL) ) {
- fprintf(stderr, "Error: -dependents given, but no dylib path specified\n");
- usage();
- exit(1);
- }
- }
-
- __block std::vector<const DyldSharedCache*> dyldCaches;
-
- const DyldSharedCache* dyldCache = nullptr;
- if ( sharedCachePath != nullptr ) {
- dyldCaches = DyldSharedCache::mapCacheFiles(sharedCachePath);
- // mapCacheFile prints an error if something goes wrong, so just return in that case.
- if ( dyldCaches.empty() )
- return 1;
- dyldCache = dyldCaches.front();
- }
- else {
- size_t cacheLength;
- dyldCache = (DyldSharedCache*)_dyld_get_shared_cache_range(&cacheLength);
- if (dyldCache == nullptr) {
- fprintf(stderr, "Could not get in-memory shared cache\n");
- return 1;
- }
- if ( options.mode == modeObjCClasses ) {
- fprintf(stderr, "Cannot use -objc-classes with a live cache. Please run with a path to an on-disk cache file\n");
- return 1;
- }
-
-
- // The in-use cache might be the first cache file of many. In that case, also add the sub caches
- dyldCache->forEachCache(^(const DyldSharedCache *cache, bool& stopCache) {
- dyldCaches.push_back(dyldCache);
- });
- }
-
- if ( options.mode == modeSlideInfo || options.mode == modeVerboseSlideInfo ) {
- if ( !dyldCache->hasSlideInfo() ) {
- fprintf(stderr, "Error: dyld shared cache does not contain slide info\n");
- exit(1);
- }
-
- const bool verboseSlideInfo = (options.mode == modeVerboseSlideInfo);
- dyldCache->forEachSlideInfo(^(uint64_t mappingStartAddress, uint64_t mappingSize, const uint8_t *mappingPagesStart,
- uint64_t slideInfoOffset, uint64_t slideInfoSize, const dyld_cache_slide_info *slideInfoHeader) {
- printSlideInfoForDataRegion(dyldCache, mappingStartAddress, mappingSize, mappingPagesStart,
- slideInfoHeader, verboseSlideInfo);
- });
- return 0;
- }
- else if ( options.mode == modeInfo ) {
- const dyld_cache_header* header = &dyldCache->header;
- uuid_string_t uuidString;
- uuid_unparse_upper(header->uuid, uuidString);
- printf("uuid: %s\n", uuidString);
-
- dyld3::Platform platform = dyldCache->platform();
- printf("platform: %s\n", dyld3::MachOFile::platformName(platform));
- printf("built by: %s\n", header->locallyBuiltCache ? "local machine" : "B&I");
- printf("cache type: %s\n", header->cacheType ? "production" : "development");
- if ( header->mappingOffset >= __offsetof(dyld_cache_header, imagesCount) ) {
- printf("image count: %u\n", header->imagesCount);
- } else {
- printf("image count: %u\n", header->imagesCountOld);
- }
- if ( (header->mappingOffset >= 0x78) && (header->branchPoolsOffset != 0) ) {
- printf("branch pool count: %u\n", header->branchPoolsCount);
- }
- {
- uint32_t pageSize = 0x4000; // fix me for intel
- uint32_t possibleSlideValues = (uint32_t)(header->maxSlide/pageSize);
- uint32_t entropyBits = 0;
- if ( possibleSlideValues > 1 )
- entropyBits = __builtin_clz(possibleSlideValues - 1);
- printf("ASLR entropy: %u-bits (%lldMB)\n", entropyBits, header->maxSlide >> 20);
- }
-
- printf("mappings:\n");
- dyldCache->forEachRange(^(const char *mappingName, uint64_t unslidVMAddr, uint64_t vmSize,
- uint32_t cacheFileIndex, uint64_t fileOffset, uint32_t initProt, uint32_t maxProt, bool& stopRange) {
- printf("%16s %4lluMB, file offset: #%u/0x%08llX -> 0x%08llX, address: 0x%08llX -> 0x%08llX\n",
- mappingName, vmSize / (1024*1024), cacheFileIndex, fileOffset, fileOffset + vmSize, unslidVMAddr, unslidVMAddr + vmSize);
- }, ^(const DyldSharedCache* subCache, uint32_t cacheFileIndex) {
- const dyld_cache_header* subCacheHeader = &subCache->header;
-
- if ( subCacheHeader->codeSignatureOffset != 0 ) {
- uint64_t size = subCacheHeader->codeSignatureSize;
- uint64_t csAddr = subCache->getCodeSignAddress();
- if ( size != 0 )
- printf("%16s %4lluMB, file offset: #%u/0x%08llX -> 0x%08llX, address: 0x%08llX -> 0x%08llX\n",
- "code sign", size/(1024*1024), cacheFileIndex,
- subCacheHeader->codeSignatureOffset, subCacheHeader->codeSignatureOffset + size, csAddr, csAddr + size);
- }
-
- if ( subCacheHeader->mappingOffset > __offsetof(dyld_cache_header, rosettaReadOnlySize) ) {
- if ( subCacheHeader->rosettaReadOnlySize != 0 ) {
- printf("Rosetta RO: %4lluMB, address: 0x%08llX -> 0x%08llX\n",
- subCacheHeader->rosettaReadOnlySize/(1024*1024), subCacheHeader->rosettaReadOnlyAddr,
- subCacheHeader->rosettaReadOnlyAddr + subCacheHeader->rosettaReadOnlySize);
- }
- if ( subCacheHeader->rosettaReadWriteSize != 0 ) {
- printf("Rosetta RW: %4lluMB, address: 0x%08llX -> 0x%08llX\n",
- subCacheHeader->rosettaReadWriteSize/(1024*1024), subCacheHeader->rosettaReadWriteAddr,
- subCacheHeader->rosettaReadWriteAddr + subCacheHeader->rosettaReadWriteSize);
- }
- }
-
- subCache->forEachSlideInfo(^(uint64_t mappingStartAddress, uint64_t mappingSize, const uint8_t *mappingPagesStart,
- uint64_t slideInfoOffset, uint64_t slideInfoSize, const dyld_cache_slide_info *slideInfoHeader) {
-
- printf("slide info: %4lluKB, file offset: #%u/0x%08llX -> 0x%08llX\n",
- slideInfoSize/1024, cacheFileIndex, slideInfoOffset, slideInfoOffset + slideInfoSize);
- });
- if ( subCacheHeader->localSymbolsOffset != 0 )
- printf("local symbols: %3lluMB, file offset: #%u/0x%08llX -> 0x%08llX\n",
- subCacheHeader->localSymbolsSize/(1024*1024), cacheFileIndex,
- subCacheHeader->localSymbolsOffset, subCacheHeader->localSymbolsOffset + subCacheHeader->localSymbolsSize);
- });
- }
- else if ( options.mode == modeTextInfo ) {
- const dyld_cache_header* header = &dyldCache->header;
- printf("dylib text infos (count=%llu):\n", header->imagesTextCount);
- dyldCache->forEachImageTextSegment(^(uint64_t loadAddressUnslid, uint64_t textSegmentSize, const unsigned char *dylibUUID, const char *installName, bool &stop) {
- uuid_string_t uuidString;
- uuid_unparse_upper(dylibUUID, uuidString);
- printf(" 0x%09llX -> 0x%09llX <%s> %s\n", loadAddressUnslid, loadAddressUnslid + textSegmentSize, uuidString, installName);
- });
- }
- else if ( options.mode == modeLocalSymbols ) {
- if ( !dyldCache->hasLocalSymbolsInfo() && !dyldCache->hasLocalSymbolsInfoFile() ) {
- fprintf(stderr, "Error: dyld shared cache does not contain local symbols info\n");
- exit(1);
- }
-
- if ( sharedCachePath == nullptr ) {
- fprintf(stderr, "Cannot use -local_symbols with a live cache. Please run with a path to an on-disk cache file\n");
- exit(1);
- }
-
- // The locals are in an unmapped part of the cache. So use the introspection APIs to map them in
- // For now only support the case where the cache was passed in as a file, not the live cache
-#pragma clang diagnostic push
-#pragma clang diagnostic ignored "-Wunguarded-availability-new"
- const bool is64 = (strstr(dyldCache->archName(), "64") != nullptr) && (strstr(dyldCache->archName(), "64_32") == nullptr);
- bool mappedCacheFile = dyld_shared_cache_for_file(sharedCachePath, ^(dyld_shared_cache_t cache) {
- __block uint32_t entriesCount = 0;
- dyld_shared_cache_for_each_image(cache, ^(dyld_image_t image) {
- // FIXME: Use dyld_image_get_file_path(image) when its available
- const char* imageName = dyldCache->getIndexedImagePath(entriesCount);
- bool foundNList = dyld_image_local_nlist_content_4Symbolication(image,
- ^(const void* nlistStart, uint64_t nlistCount,
- const char* stringTable) {
- printf("Local symbols nlist for: %s\n", imageName);
- if ( is64 ) {
- const nlist_64* symTab = (nlist_64*)nlistStart;
- for (int e = 0; e < nlistCount; ++e) {
- const nlist_64* entry = &symTab[e];
- printf(" nlist[%d].str=%d, %s\n", e, entry->n_un.n_strx, &stringTable[entry->n_un.n_strx]);
- printf(" nlist[%d].value=0x%0llX\n", e, entry->n_value);
- }
- } else {
- const struct nlist* symTab = (struct nlist*)nlistStart;
- for (int e = 0; e < nlistCount; ++e) {
- const struct nlist* entry = &symTab[e];
- printf(" nlist[%d].str=%d, %s\n", e, entry->n_un.n_strx, &stringTable[entry->n_un.n_strx]);
- printf(" nlist[%d].value=0x%0X\n", e, entry->n_value);
- }
- }
- });
- if ( !foundNList ) {
- fprintf(stderr, "Error: Failed to find local symbols nlist for: %s\n", imageName);
- exit(1);
- }
- entriesCount++;
- });
- printf("local symbols by dylib (count=%d):\n", entriesCount);
- });
-
- if ( !mappedCacheFile ) {
- fprintf(stderr, "Error: Failed to map local symbols for shared cache file\n");
- exit(1);
- }
-#pragma clang diagnostic pop
-
-#if 0
- const bool is64 = (strstr(dyldCache->archName(), "64") != NULL);
- const uint32_t nlistFileOffset = (uint32_t)((uint8_t*)dyldCache->getLocalNlistEntries() - (uint8_t*)dyldCache);
- const uint32_t nlistCount = dyldCache->getLocalNlistCount();
- const uint32_t nlistByteSize = is64 ? nlistCount*16 : nlistCount*12;
- const char* localStrings = dyldCache->getLocalStrings();
- const uint32_t stringsFileOffset = (uint32_t)((uint8_t*)localStrings - (uint8_t*)dyldCache);
- const uint32_t stringsSize = dyldCache->getLocalStringsSize();
-
- printf("local symbols nlist array: %3uMB, file offset: 0x%08X -> 0x%08X\n", nlistByteSize/(1024*1024), nlistFileOffset, nlistFileOffset+nlistByteSize);
- printf("local symbols string pool: %3uMB, file offset: 0x%08X -> 0x%08X\n", stringsSize/(1024*1024), stringsFileOffset, stringsFileOffset+stringsSize);
-
- __block uint32_t entriesCount = 0;
- dyldCache->forEachLocalSymbolEntry(^(uint64_t dylibCacheVMOffset, uint32_t nlistStartIndex, uint32_t nCount, bool &stop) {
- const char* imageName = dyldCache->getIndexedImagePath(entriesCount);
- printf(" nlistStartIndex=%5d, nlistCount=%5d, image=%s\n", nlistStartIndex, nCount, imageName);
-#if 0
- if ( is64 ) {
- const nlist_64* symTab = (nlist_64*)((char*)dyldCache + nlistFileOffset);
- for (int e = 0; e < nlistLocalCount; ++e) {
- const nlist_64* entry = &symTab[nlistStartIndex + e];
- printf(" nlist[%d].str=%d, %s\n", e, entry->n_un.n_strx, &localStrings[entry->n_un.n_strx]);
- printf(" nlist[%d].value=0x%0llX\n", e, entry->n_value);
- }
- }
-#endif
- entriesCount++;
- });
- printf("local symbols by dylib (count=%d):\n", entriesCount);
-#endif
- }
- else if ( options.mode == modeJSONMap ) {
- std::string buffer = dyldCache->generateJSONMap("unknown");
- printf("%s\n", buffer.c_str());
- }
- else if ( options.mode == modeJSONDependents ) {
- std::cout << dyldCache->generateJSONDependents();
- }
- else if ( options.mode == modeStrings ) {
- if (printStrings) {
- // The cache has not been slid if we loaded it from disk
- bool cacheRebased = (sharedCachePath == nullptr);
- dyld3::MachOAnalyzer::VMAddrConverter vmAddrConverter = dyldCache->makeVMAddrConverter(cacheRebased);
- if ( !cacheRebased )
- dyldCache->applyCacheRebases();
-
- uint64_t sharedCacheRelativeSelectorBaseVMAddress = getSharedCacheRelativeSelectorBaseVMAddress(dyldCache, cacheRebased);
-
- dyldCache->forEachImage(^(const mach_header *mh, const char *installName) {
- __block std::unordered_set<std::string_view> seenStrings;
- const dyld3::MachOAnalyzer* ma = (dyld3::MachOAnalyzer*)mh;
- int64_t slide = ma->getSlide();
- uint32_t pointerSize = ma->pointerSize();
-
- ma->forEachSection(^(const dyld3::MachOAnalyzer::SectionInfo& info, bool malformedSectionRange, bool& stop) {
- if ( ( (info.sectFlags & SECTION_TYPE) == S_CSTRING_LITERALS ) ) {
- if ( malformedSectionRange ) {
- stop = true;
- return;
- }
- const uint8_t* content = (uint8_t*)(info.sectAddr + slide);
- const char* s = (char*)content;
- const char* end = s + info.sectSize;
- while ( s < end ) {
- printf("%s: %s\n", installName, s);
- seenStrings.insert(s);
- while (*s != '\0' )
- ++s;
- ++s;
- }
- }
- });
-
- // objc string sections are coalesced in the builder, so might not be present above
- // Find referenced objc strings by walking the other objc metadata
- auto printString = ^(uint64_t stringVMAddr) {
- const char* selString = (const char*)stringVMAddr + slide;
- auto itAndInserted = seenStrings.insert(selString);
- if ( itAndInserted.second )
- printf("%s: %s\n", installName, selString);
- };
-
- auto visitMethod = ^(uint64_t methodVMAddr, const dyld3::MachOAnalyzer::ObjCMethod& method,
- bool& stopMethod) {
- printString(method.nameVMAddr);
- printString(method.typesVMAddr);
- };
-
- auto visitProperty = ^(uint64_t propertyVMAddr, const dyld3::MachOAnalyzer::ObjCProperty& property) {
- printString(property.nameVMAddr);
- };
-
- Diagnostics diag;
- ma->forEachObjCSelectorReference(diag, vmAddrConverter,
- ^(uint64_t selRefVMAddr, uint64_t selRefTargetVMAddr, bool &stop) {
- printString(selRefTargetVMAddr);
- });
-
- // If the cache hasn't been rebased, then we can also print other objc metadata, such as classes
- // If we are doing this, then we need to patch the cache to undo the bit-stealing in the ASLR format
- if ( !cacheRebased ) {
- auto visitClass = ^(uint64_t classVMAddr,
- uint64_t classSuperclassVMAddr, uint64_t classDataVMAddr,
- const dyld3::MachOAnalyzer::ObjCClassInfo& objcClass, bool isMetaClass,
- bool& stop) {
- printString(objcClass.nameVMAddr(pointerSize));
- ma->forEachObjCMethod(objcClass.baseMethodsVMAddr(pointerSize), vmAddrConverter, sharedCacheRelativeSelectorBaseVMAddress, visitMethod);
- ma->forEachObjCProperty(objcClass.basePropertiesVMAddr(pointerSize), vmAddrConverter, visitProperty);
- };
-
- auto visitCategory = ^(uint64_t categoryVMAddr,
- const dyld3::MachOAnalyzer::ObjCCategory& objcCategory,
- bool& stopCategory) {
- printString(objcCategory.nameVMAddr);
- ma->forEachObjCMethod(objcCategory.instanceMethodsVMAddr, vmAddrConverter, sharedCacheRelativeSelectorBaseVMAddress, visitMethod);
- ma->forEachObjCMethod(objcCategory.classMethodsVMAddr, vmAddrConverter, sharedCacheRelativeSelectorBaseVMAddress, visitMethod);
- ma->forEachObjCMethod(objcCategory.instanceMethodsVMAddr, vmAddrConverter, sharedCacheRelativeSelectorBaseVMAddress, visitMethod);
- ma->forEachObjCProperty(objcCategory.instancePropertiesVMAddr, vmAddrConverter, visitProperty);
- };
-
- auto visitProtocol = ^(uint64_t protoVMAddr,
- const dyld3::MachOAnalyzer::ObjCProtocol& objcProto,
- bool& stopProtocol) {
- printString(objcProto.nameVMAddr);
- ma->forEachObjCMethod(objcProto.instanceMethodsVMAddr, vmAddrConverter, sharedCacheRelativeSelectorBaseVMAddress, visitMethod);
- ma->forEachObjCMethod(objcProto.classMethodsVMAddr, vmAddrConverter, sharedCacheRelativeSelectorBaseVMAddress, visitMethod);
- ma->forEachObjCMethod(objcProto.optionalInstanceMethodsVMAddr, vmAddrConverter, sharedCacheRelativeSelectorBaseVMAddress, visitMethod);
- ma->forEachObjCMethod(objcProto.optionalClassMethodsVMAddr, vmAddrConverter, sharedCacheRelativeSelectorBaseVMAddress, visitMethod);
- };
-
- ma->forEachObjCClass(diag, vmAddrConverter, visitClass);
- ma->forEachObjCCategory(diag, vmAddrConverter, visitCategory);
- ma->forEachObjCProtocol(diag, vmAddrConverter, visitProtocol);
- }
- });
- }
-
- if (printExports) {
- dyldCache->forEachImage(^(const mach_header *mh, const char *installName) {
- const dyld3::MachOAnalyzer* ma = (dyld3::MachOAnalyzer*)mh;
- uint32_t exportTrieRuntimeOffset;
- uint32_t exportTrieSize;
- if ( ma->hasExportTrie(exportTrieRuntimeOffset, exportTrieSize) ) {
- const uint8_t* start = (uint8_t*)mh + exportTrieRuntimeOffset;
- const uint8_t* end = start + exportTrieSize;
- std::vector<ExportInfoTrie::Entry> exports;
- if ( !ExportInfoTrie::parseTrie(start, end, exports) ) {
- return;
- }
-
- for (const ExportInfoTrie::Entry& entry: exports) {
- printf("%s: %s\n", installName, entry.name.c_str());
- }
- }
- });
- }
- }
- else if ( options.mode == modeSectionSizes ) {
- __block std::map<std::string, uint64_t> sectionSizes;
- dyldCache->forEachImage(^(const mach_header *mh, const char *installName) {
- const dyld3::MachOAnalyzer* ma = (const dyld3::MachOAnalyzer*)mh;
- ma->forEachSection(^(const dyld3::MachOAnalyzer::SectionInfo §Info, bool malformedSectionRange, bool &stop) {
- std::string section = std::string(sectInfo.segInfo.segName) + " " + sectInfo.sectName;
- sectionSizes[section] += sectInfo.sectSize;
- });
- });
- for (const auto& keyAndValue : sectionSizes) {
- printf("%lld %s\n", keyAndValue.second, keyAndValue.first.c_str());
- }
- }
- else if ( options.mode == modeObjCInfo ) {
- const objc_opt::objc_opt_t* objcOpt = dyldCache->objcOpt();
- if ( objcOpt == nullptr ) {
- fprintf(stderr, "Error: could not get optimized objc\n");
- return 1;
- }
-
- printf("version: %u\n", objcOpt->version);
- printf("flags: 0x%08x\n", objcOpt->flags);
- if ( const objc::SelectorHashTable* selectors = dyldCache->objcOpt()->selectorOpt() ) {
- printf("num selectors: %u\n", selectors->occupancy());
- }
- if ( const objc::ClassHashTable* classes = dyldCache->objcOpt()->classOpt() ) {
- printf("num classes: %u\n", classes->occupancy());
- }
- if ( const objc::ProtocolHashTable* protocols = dyldCache->objcOpt()->protocolOpt() ) {
- printf("num protocols: %u\n", protocols->occupancy());
- }
- if ( const void* relativeMethodListSelectorBase = dyldCache->objcOpt()->relativeMethodListsBaseAddress() ) {
- printf("method list selector base address: 0x%llx\n", dyldCache->unslidLoadAddress() + ((uint64_t)relativeMethodListSelectorBase - (uint64_t)dyldCache));
- printf("method list selector base value: \"%s\"\n", (const char*)relativeMethodListSelectorBase);
- }
- }
- else if ( options.mode == modeObjCProtocols ) {
- if ( dyldCache->objcOpt() == nullptr ) {
- fprintf(stderr, "Error: could not get optimized objc\n");
- return 1;
- }
- const objc::ProtocolHashTable* protocols = dyldCache->objcOpt()->protocolOpt();
- if ( protocols == nullptr ) {
- fprintf(stderr, "Error: could not get optimized objc protocols\n");
- return 1;
- }
-
- protocols->forEachProtocol(^(uint32_t bucketIndex, const char* protocolName, const dyld3::Array<uint64_t>& implCacheOffsets) {
-
- if ( implCacheOffsets.empty() ) {
- // Empty bucket
- fprintf(stderr, "[% 5d]\n", bucketIndex);
- return;
- }
-
- if ( implCacheOffsets.count() == 1 ) {
- // No duplicates
- fprintf(stderr, "[% 5d] -> (% 8lld) = %s\n", bucketIndex, implCacheOffsets[0], protocolName);
- return;
- }
-
- // class appears in more than one header
- fprintf(stderr, "[% 5d] -> %lu duplicates = %s\n", bucketIndex, implCacheOffsets.count(), protocolName);
- for (uint64_t cacheOffset : implCacheOffsets) {
- fprintf(stderr, " - [% 5d] -> (% 8lld) = %s\n", bucketIndex, cacheOffset, protocolName);
- }
- });
- }
- else if ( options.mode == modeObjCClasses ) {
-
- // If we are running on macOS against a cache for another device, then we need a root path to find on-disk dylibs/executables
- if ( (dyld3::Platform)dyld_get_active_platform() != dyldCache->platform() ) {
- if ( options.rootPath == nullptr ) {
- fprintf(stderr, "Analyzing cache file requires a root path for on-disk binaries. Rerun with -fs-root *path*\n");
- return 1;
- }
- }
-
- dyldCache->applyCacheRebases();
-
- auto getString = ^const char *(const dyld3::MachOAnalyzer* ma, uint64_t nameVMAddr){
- dyld3::MachOAnalyzer::PrintableStringResult result;
- const char* name = ma->getPrintableString(nameVMAddr, result);
- if (result == dyld3::MachOAnalyzer::PrintableStringResult::CanPrint)
- return name;
- return nullptr;
- };
-
- // We don't actually slide the cache. It still contains unslid VMAddr's
- const bool rebased = false;
-
- uint64_t sharedCacheRelativeSelectorBaseVMAddress = getSharedCacheRelativeSelectorBaseVMAddress(dyldCache, rebased);
-
- using dyld3::json::Node;
- using dyld3::json::NodeValueType;
-
- std::string instancePrefix("-");
- std::string classPrefix("+");
-
- // Build a map of class vm addrs to their names so that categories know the
- // name of the class they are attaching to
- __block std::unordered_map<uint64_t, const char*> classVMAddrToName;
- __block std::unordered_map<uint64_t, const char*> metaclassVMAddrToName;
- dyldCache->forEachImage(^(const mach_header *mh, const char *installName) {
- const dyld3::MachOAnalyzer* ma = (const dyld3::MachOAnalyzer*)mh;
- const uint32_t pointerSize = ma->pointerSize();
-
- auto visitClass = ^(uint64_t classVMAddr,
- uint64_t classSuperclassVMAddr, uint64_t classDataVMAddr,
- const dyld3::MachOAnalyzer::ObjCClassInfo& objcClass, bool isMetaClass,
- bool& stop) {
- if (auto className = getString(ma, objcClass.nameVMAddr(pointerSize))) {
- if (isMetaClass)
- metaclassVMAddrToName[classVMAddr] = className;
- else
- classVMAddrToName[classVMAddr] = className;
- }
- };
-
- Diagnostics diag;
-
- dyld3::MachOAnalyzer::VMAddrConverter vmAddrConverter = dyldCache->makeVMAddrConverter(rebased);
- ma->forEachObjCClass(diag, vmAddrConverter, visitClass);
- });
-
- // These are used only for the on-disk binaries we analyze
- __block std::vector<const char*> onDiskChainedFixupBindTargets;
- __block std::unordered_map<uint64_t, const char*> onDiskClassVMAddrToName;
- __block std::unordered_map<uint64_t, const char*> onDiskMetaclassVMAddrToName;
-
- auto getProperties = ^(const dyld3::MachOAnalyzer* ma, uint64_t propertiesVMAddr,
- const dyld3::MachOAnalyzer::VMAddrConverter& vmAddrConverter) {
- __block Node propertiesNode;
- auto visitProperty = ^(uint64_t propertyVMAddr, const dyld3::MachOAnalyzer::ObjCProperty& property) {
- // Get the name && attributes
- auto propertyName = getString(ma, property.nameVMAddr);
- auto propertyAttributes = getString(ma, property.attributesVMAddr);
-
- if (!propertyName || !propertyAttributes)
- return;
-
- Node propertyNode;
- propertyNode.map["name"] = Node{propertyName};
- propertyNode.map["attributes"] = Node{propertyAttributes};
- propertiesNode.array.push_back(propertyNode);
- };
- ma->forEachObjCProperty(propertiesVMAddr, vmAddrConverter, visitProperty);
- return propertiesNode.array.empty() ? std::optional<Node>() : propertiesNode;
- };
-
- auto getClassProtocols = ^(const dyld3::MachOAnalyzer* ma, uint64_t protocolsVMAddr,
- const dyld3::MachOAnalyzer::VMAddrConverter& vmAddrConverter) {
- __block Node protocolsNode;
-
- auto visitProtocol = ^(uint64_t protocolVMAddr, const dyld3::MachOAnalyzer::ObjCProtocol& protocol) {
- if (const char *name = getString(ma, protocol.nameVMAddr)) {
- protocolsNode.array.push_back(Node{name});
- }
- };
-
- ma->forEachObjCProtocol(protocolsVMAddr, vmAddrConverter, visitProtocol);
-
- return protocolsNode.array.empty() ? std::optional<Node>() : protocolsNode;
- };
-
- auto getProtocols = ^(const dyld3::MachOAnalyzer* ma,
- const dyld3::MachOAnalyzer::VMAddrConverter& vmAddrConverter) {
- __block Node protocols;
-
- auto getMethods = ^(const dyld3::MachOAnalyzer* mh, uint64_t methodListVMAddr, const std::string &prefix, Node &node){
- auto visitMethod = ^(uint64_t methodVMAddr, const dyld3::MachOAnalyzer::ObjCMethod& method,
- bool& stopMethod) {
- if (auto name = getString(mh, method.nameVMAddr)) {
- node.array.push_back(Node{prefix + name});
- }
- };
-
- ma->forEachObjCMethod(methodListVMAddr, vmAddrConverter, sharedCacheRelativeSelectorBaseVMAddress, visitMethod);
- };
-
- auto visitProtocol = ^(uint64_t protoVMAddr,
- const dyld3::MachOAnalyzer::ObjCProtocol& objcProto,
- bool& stopProtocol) {
- const char* protoName = getString(ma, objcProto.nameVMAddr);
- if (!protoName)
- return;
-
- Node entry;
- entry.map["protocolName"] = Node{protoName};
-
- if ( objcProto.protocolsVMAddr != 0 ) {
- __block Node visitedProtocols;
-
- auto visitProtocolInner = ^(uint64_t protocolRefVMAddr, const dyld3::MachOAnalyzer::ObjCProtocol& protocol) {
- if (auto name = getString(ma, protocol.nameVMAddr)) {
- visitedProtocols.array.push_back(Node{name});
- }
- };
-
- ma->forEachObjCProtocol(objcProto.protocolsVMAddr, vmAddrConverter, visitProtocolInner);
- if (!visitedProtocols.array.empty()) {
- entry.map["protocols"] = visitedProtocols;
- }
- }
-
- Node methods;
- getMethods(ma, objcProto.instanceMethodsVMAddr, instancePrefix, methods);
- getMethods(ma, objcProto.classMethodsVMAddr, classPrefix, methods);
- if (!methods.array.empty()) {
- entry.map["methods"] = methods;
- }
-
- Node optMethods;
- getMethods(ma, objcProto.optionalInstanceMethodsVMAddr, instancePrefix, optMethods);
- getMethods(ma, objcProto.optionalClassMethodsVMAddr, classPrefix, optMethods);
- if (!optMethods.array.empty()) {
- entry.map["optionalMethods"] = optMethods;
- }
-
- protocols.array.push_back(entry);
- };
-
- Diagnostics diag;
- ma->forEachObjCProtocol(diag, vmAddrConverter, visitProtocol);
-
- return protocols.array.empty() ? std::optional<Node>() : protocols;
- };
-
- auto getSelRefs = ^(const dyld3::MachOAnalyzer* ma,
- const dyld3::MachOAnalyzer::VMAddrConverter& vmAddrConverter) {
- __block std::vector<const char *> selNames;
-
- auto visitSelRef = ^(uint64_t selRefVMAddr, uint64_t selRefTargetVMAddr, bool& stop) {
- if (auto selValue = getString(ma, selRefTargetVMAddr)) {
- selNames.push_back(selValue);
- }
- };
-
- Diagnostics diag;
- ma->forEachObjCSelectorReference(diag, vmAddrConverter, visitSelRef);
-
- std::sort(selNames.begin(), selNames.end(),
- [](const char* a, const char* b) {
- return strcasecmp(a, b) < 0;
- });
-
- Node selrefs;
- for (auto s: selNames) {
- selrefs.array.push_back(Node{s});
- }
-
- return selrefs.array.empty() ? std::optional<Node>() : selrefs;
- };
-
- auto getClasses = ^(const dyld3::MachOAnalyzer* ma,
- const dyld3::MachOAnalyzer::VMAddrConverter& vmAddrConverter) {
- Diagnostics diag;
- const uint32_t pointerSize = ma->pointerSize();
-
- // Get the vmAddrs for all exported symbols as we want to know if classes
- // are exported
- std::set<uint64_t> exportedSymbolVMAddrs;
- {
- uint64_t loadAddress = ma->preferredLoadAddress();
-
- uint32_t exportTrieRuntimeOffset;
- uint32_t exportTrieSize;
- if ( ma->hasExportTrie(exportTrieRuntimeOffset, exportTrieSize) ) {
- const uint8_t* start = (uint8_t*)ma + exportTrieRuntimeOffset;
- const uint8_t* end = start + exportTrieSize;
- std::vector<ExportInfoTrie::Entry> exports;
- if ( ExportInfoTrie::parseTrie(start, end, exports) ) {
- for (const ExportInfoTrie::Entry& entry: exports) {
- exportedSymbolVMAddrs.insert(loadAddress + entry.info.address);
- }
- }
- }
- }
-
- __block Node classesNode;
- __block bool skippedPreviousClass = false;
- auto visitClass = ^(uint64_t classVMAddr,
- uint64_t classSuperclassVMAddr, uint64_t classDataVMAddr,
- const dyld3::MachOAnalyzer::ObjCClassInfo& objcClass, bool isMetaClass,
- bool& stopClass) {
- if (isMetaClass) {
- if (skippedPreviousClass) {
- // If the class was bad, then skip the meta class too
- skippedPreviousClass = false;
- return;
- }
- } else {
- skippedPreviousClass = true;
- }
-
- std::string classType = "-";
- if (isMetaClass)
- classType = "+";
- dyld3::MachOAnalyzer::PrintableStringResult classNameResult;
- const char* className = ma->getPrintableString(objcClass.nameVMAddr(pointerSize), classNameResult);
- if (classNameResult != dyld3::MachOAnalyzer::PrintableStringResult::CanPrint) {
- return;
- }
-
- const char* superClassName = nullptr;
- if ( DyldSharedCache::inDyldCache(dyldCache, ma) ) {
- if ( objcClass.superclassVMAddr != 0 ) {
- if (isMetaClass) {
- // If we are root class, then our superclass should actually point to our own class
- const uint32_t RO_ROOT = (1<<1);
- if ( objcClass.flags(pointerSize) & RO_ROOT ) {
- auto it = classVMAddrToName.find(objcClass.superclassVMAddr);
- assert(it != classVMAddrToName.end());
- superClassName = it->second;
- } else {
- auto it = metaclassVMAddrToName.find(objcClass.superclassVMAddr);
- assert(it != metaclassVMAddrToName.end());
- superClassName = it->second;
- }
- } else {
- auto it = classVMAddrToName.find(objcClass.superclassVMAddr);
- assert(it != classVMAddrToName.end());
- superClassName = it->second;
- }
- }
- } else {
- // On-disk binary. Lets crack the chain to work out what we are pointing at
- dyld3::MachOAnalyzer::ChainedFixupPointerOnDisk fixup;
- if ( pointerSize == 8 )
- fixup.raw64 = objcClass.superclassVMAddr;
- else
- fixup.raw32 = (uint32_t)objcClass.superclassVMAddr;
- uint32_t bindOrdinal;
- int64_t embeddedAddend;
- if (fixup.isBind(vmAddrConverter.chainedPointerFormat, bindOrdinal, embeddedAddend)) {
- // Bind to another image. Use the bind table to work out which name to bind to
- const char* symbolName = onDiskChainedFixupBindTargets[(size_t)bindOrdinal];
- if (isMetaClass) {
- if ( strstr(symbolName, "_OBJC_METACLASS_$_") == symbolName ) {
- superClassName = symbolName + strlen("_OBJC_METACLASS_$_");
- } else {
- // Swift classes don't start with these prefixes so just skip them
- if (objcClass.isSwiftLegacy || objcClass.isSwiftStable)
- return;
- }
- } else {
- if ( strstr(symbolName, "_OBJC_CLASS_$_") == symbolName ) {
- superClassName = symbolName + strlen("_OBJC_CLASS_$_");
- } else {
- // Swift classes don't start with these prefixes so just skip them
- if (objcClass.isSwiftLegacy || objcClass.isSwiftStable)
- return;
- }
- }
- } else {
- // Rebase within this image.
- if (isMetaClass) {
- auto it = onDiskMetaclassVMAddrToName.find(objcClass.superclassVMAddr);
- assert(it != onDiskMetaclassVMAddrToName.end());
- superClassName = it->second;
- } else {
- auto it = onDiskClassVMAddrToName.find(objcClass.superclassVMAddr);
- assert(it != onDiskClassVMAddrToName.end());
- superClassName = it->second;
- }
- }
- }
-
- // Print the methods on this class
- __block Node methodsNode;
- auto visitMethod = ^(uint64_t methodVMAddr, const dyld3::MachOAnalyzer::ObjCMethod& method, bool& stopMethod) {
- dyld3::MachOAnalyzer::PrintableStringResult methodNameResult;
- const char* methodName = ma->getPrintableString(method.nameVMAddr, methodNameResult);
- if (methodNameResult != dyld3::MachOAnalyzer::PrintableStringResult::CanPrint)
- return;
- methodsNode.array.push_back(Node{classType + methodName});
- };
- ma->forEachObjCMethod(objcClass.baseMethodsVMAddr(pointerSize), vmAddrConverter,
- sharedCacheRelativeSelectorBaseVMAddress, visitMethod);
-
- std::optional<Node> properties = getProperties(ma, objcClass.basePropertiesVMAddr(pointerSize), vmAddrConverter);
-
- if (isMetaClass) {
- assert(!classesNode.array.empty());
- Node& currentClassNode = classesNode.array.back();
- assert(currentClassNode.map["className"].value == className);
- if (!methodsNode.array.empty()) {
- Node& currentMethodsNode = currentClassNode.map["methods"];
- currentMethodsNode.array.insert(currentMethodsNode.array.end(),
- methodsNode.array.begin(),
- methodsNode.array.end());
- }
- if (properties.has_value()) {
- Node& currentPropertiesNode = currentClassNode.map["properties"];
- currentPropertiesNode.array.insert(currentPropertiesNode.array.end(),
- properties->array.begin(),
- properties->array.end());
- }
- return;
- }
-
- Node currentClassNode;
- currentClassNode.map["className"] = Node{className};
- if ( superClassName != nullptr )
- currentClassNode.map["superClassName"] = Node{superClassName};
- if (!methodsNode.array.empty())
- currentClassNode.map["methods"] = methodsNode;
- if (properties.has_value())
- currentClassNode.map["properties"] = properties.value();
- if (std::optional<Node> protocols = getClassProtocols(ma, objcClass.baseProtocolsVMAddr(pointerSize), vmAddrConverter))
- currentClassNode.map["protocols"] = protocols.value();
-
- currentClassNode.map["exported"] = Node{exportedSymbolVMAddrs.count(classVMAddr) != 0};
-
- // We didn't skip this class so mark it as such
- skippedPreviousClass = false;
-
- classesNode.array.push_back(currentClassNode);
- };
-
- ma->forEachObjCClass(diag, vmAddrConverter, visitClass);
- return classesNode.array.empty() ? std::optional<Node>() : classesNode;
- };
-
- auto getCategories = ^(const dyld3::MachOAnalyzer* ma,
- const dyld3::MachOAnalyzer::VMAddrConverter& vmAddrConverter) {
- Diagnostics diag;
-
- const uint32_t pointerSize = ma->pointerSize();
-
- __block Node categoriesNode;
- auto visitCategory = ^(uint64_t categoryVMAddr,
- const dyld3::MachOAnalyzer::ObjCCategory& objcCategory,
- bool& stopCategory) {
- dyld3::MachOAnalyzer::PrintableStringResult categoryNameResult;
- const char* categoryName = ma->getPrintableString(objcCategory.nameVMAddr, categoryNameResult);
- if (categoryNameResult != dyld3::MachOAnalyzer::PrintableStringResult::CanPrint)
- return;
-
- const char* className = nullptr;
- if ( DyldSharedCache::inDyldCache(dyldCache, ma) ) {
- // The class might be missing if the target is not in the shared cache. So just skip these ones
- if ( objcCategory.clsVMAddr == 0 )
- return;
-
- auto it = classVMAddrToName.find(objcCategory.clsVMAddr);
- if (it == classVMAddrToName.end()) {
- // This is an odd binary with perhaps a Swift class. Just skip this entry
- // Specifically, categories can be attached to "stub classes" which are not in the
- // objc class list. Instead the ISA (really the ISA + 8" of the class the category is
- // attached to, is listed in a section called __objc_stublist. Those are Swift stub classes
- return;
- }
- className = it->second;
- } else {
- // On-disk binary. Lets crack the chain to work out what we are pointing at
- dyld3::MachOAnalyzer::ChainedFixupPointerOnDisk fixup;
- fixup.raw64 = objcCategory.clsVMAddr;
- if ( pointerSize == 8 )
- fixup.raw64 = objcCategory.clsVMAddr;
- else
- fixup.raw32 = (uint32_t)objcCategory.clsVMAddr;
- uint32_t bindOrdinal;
- int64_t embeddedAddend;
- if (fixup.isBind(vmAddrConverter.chainedPointerFormat, bindOrdinal, embeddedAddend)) {
- // Bind to another image. Use the bind table to work out which name to bind to
- const char* symbolName = onDiskChainedFixupBindTargets[(size_t)bindOrdinal];
- if ( strstr(symbolName, "_OBJC_CLASS_$_") == symbolName ) {
- className = symbolName + strlen("_OBJC_CLASS_$_");
- } else {
- // Swift classes don't start with these prefixes so just skip them
- // We don't know that this is a Swift class/category though, but skip it anyway
- return;
- }
- } else {
- auto it = onDiskClassVMAddrToName.find(objcCategory.clsVMAddr);
- if (it == onDiskClassVMAddrToName.end()) {
- // This is an odd binary with perhaps a Swift class. Just skip this entry
- return;
- }
- className = it->second;
- }
- }
-
- // Print the instance methods on this category
- __block Node methodsNode;
- auto visitInstanceMethod = ^(uint64_t methodVMAddr, const dyld3::MachOAnalyzer::ObjCMethod& method, bool& stopMethod) {
- if (auto methodName = getString(ma, method.nameVMAddr))
- methodsNode.array.push_back(Node{instancePrefix + methodName});
- };
- ma->forEachObjCMethod(objcCategory.instanceMethodsVMAddr, vmAddrConverter,
- sharedCacheRelativeSelectorBaseVMAddress, visitInstanceMethod);
-
- // Print the instance methods on this category
- __block Node classMethodsNode;
- auto visitClassMethod = ^(uint64_t methodVMAddr, const dyld3::MachOAnalyzer::ObjCMethod& method, bool& stopMethod) {
- if (auto methodName = getString(ma, method.nameVMAddr))
- methodsNode.array.push_back(Node{classPrefix + methodName});
- };
- ma->forEachObjCMethod(objcCategory.classMethodsVMAddr, vmAddrConverter,
- sharedCacheRelativeSelectorBaseVMAddress, visitClassMethod);
-
- Node currentCategoryNode;
- currentCategoryNode.map["categoryName"] = Node{categoryName};
- currentCategoryNode.map["className"] = Node{className};
- if (!methodsNode.array.empty())
- currentCategoryNode.map["methods"] = methodsNode;
- if (std::optional<Node> properties = getProperties(ma, objcCategory.instancePropertiesVMAddr, vmAddrConverter))
- currentCategoryNode.map["properties"] = properties.value();
- if (std::optional<Node> protocols = getClassProtocols(ma, objcCategory.protocolsVMAddr, vmAddrConverter))
- currentCategoryNode.map["protocols"] = protocols.value();
-
- categoriesNode.array.push_back(currentCategoryNode);
- };
-
- ma->forEachObjCCategory(diag, vmAddrConverter, visitCategory);
- return categoriesNode.array.empty() ? std::optional<Node>() : categoriesNode;
- };
-
- __block bool needsComma = false;
-
- dyld3::json::streamArrayBegin(needsComma);
-
- dyldCache->forEachImage(^(const mach_header *mh, const char *installName) {
- dyld3::MachOAnalyzer::VMAddrConverter vmAddrConverter = dyldCache->makeVMAddrConverter(rebased);
- const dyld3::MachOAnalyzer* ma = (const dyld3::MachOAnalyzer*)mh;
-
- Node imageRecord;
- imageRecord.map["imagePath"] = Node{installName};
- imageRecord.map["imageType"] = Node{"cache-dylib"};
- std::optional<Node> classes = getClasses(ma, vmAddrConverter);
- std::optional<Node> categories = getCategories(ma, vmAddrConverter);
- std::optional<Node> protocols = getProtocols(ma, vmAddrConverter);
- std::optional<Node> selrefs = getSelRefs(ma, vmAddrConverter);
-
- // Skip emitting images with no objc data
- if (!classes.has_value() && !categories.has_value() && !protocols.has_value() && !selrefs.has_value())
- return;
- if (classes.has_value())
- imageRecord.map["classes"] = classes.value();
- if (categories.has_value())
- imageRecord.map["categories"] = categories.value();
- if (protocols.has_value())
- imageRecord.map["protocols"] = protocols.value();
- if (selrefs.has_value())
- imageRecord.map["selrefs"] = selrefs.value();
-
- dyld3::json::streamArrayNode(needsComma, imageRecord);
- });
-
- const dyld3::MachOAnalyzer* mainMA = nullptr;
- if ( dyldCache ) {
- // gracefully handling older dyld caches
- if ( dyldCache->header.mappingOffset < 0x170 ) {
- fprintf(stderr, "dyld_closure_util: can't operate against an old (pre-dyld4) dyld cache\n");
- exit(1);
- }
-
- // HACK: use libSystem.dylib from cache as main executable to bootstrap state
- uint32_t imageIndex;
- if ( dyldCache->hasImagePath("/usr/lib/libSystem.B.dylib", imageIndex) ) {
- uint64_t ignore1;
- uint64_t ignore2;
- mainMA = (MachOAnalyzer*)dyldCache->getIndexedImageEntry(imageIndex, ignore1, ignore2);
- }
- }
-
- KernelArgs kernArgs(mainMA, {"test.exe"}, {}, {});
- SyscallDelegate osDelegate;
- osDelegate._dyldCache = dyldCache;
- osDelegate._rootPath = options.rootPath;
-
- __block ProcessConfig config(&kernArgs, osDelegate);
- RuntimeState stateObject(config);
- RuntimeState& state = stateObject;
-
- config.dyldCache.addr->forEachLaunchLoaderSet(^(const char* executableRuntimePath, const PrebuiltLoaderSet* pbls) {
-
- __block Diagnostics diag;
- bool checkIfOSBinary = state.config.process.archs->checksOSBinary();
- state.config.syscall.withReadOnlyMappedFile(diag, executableRuntimePath, checkIfOSBinary, ^(const void* mapping, size_t mappedSize, bool isOSBinary, const FileID& fileID, const char* canonicalPath) {
- if ( const dyld3::MachOFile* mf = dyld3::MachOFile::compatibleSlice(diag, mapping, mappedSize, executableRuntimePath, state.config.process.platform, isOSBinary, *state.config.process.archs) ) {
- const dyld3::MachOAnalyzer* ma = (const dyld3::MachOAnalyzer*)mf;
- uint32_t pointerSize = ma->pointerSize();
-
- // Populate the bind targets for classes from other images
- onDiskChainedFixupBindTargets.clear();
- ma->forEachChainedFixupTarget(diag, ^(int libOrdinal, const char* symbolName, uint64_t addend, bool weakImport, bool& stop) {
- onDiskChainedFixupBindTargets.push_back(symbolName);
- });
- if ( diag.hasError() )
- return;
-
- // Populate the rebase targets for class names
- onDiskMetaclassVMAddrToName.clear();
- onDiskClassVMAddrToName.clear();
- auto visitClass = ^(uint64_t classVMAddr,
- uint64_t classSuperclassVMAddr, uint64_t classDataVMAddr,
- const dyld3::MachOAnalyzer::ObjCClassInfo& objcClass, bool isMetaClass,
- bool& stopClass) {
- if (auto className = getString(ma, objcClass.nameVMAddr(pointerSize))) {
- if (isMetaClass)
- onDiskMetaclassVMAddrToName[classVMAddr] = className;
- else
- onDiskClassVMAddrToName[classVMAddr] = className;
- }
- };
-
- // Get a vmAddrConverter for this on-disk binary. We can't use the shared cache one
- dyld3::MachOAnalyzer::VMAddrConverter onDiskVMAddrConverter = ma->makeVMAddrConverter(rebased);
-
- ma->forEachObjCClass(diag, onDiskVMAddrConverter, visitClass);
-
- Node imageRecord;
- imageRecord.map["imagePath"] = Node{executableRuntimePath};
- imageRecord.map["imageType"] = Node{"executable"};
- std::optional<Node> classes = getClasses(ma, onDiskVMAddrConverter);
- std::optional<Node> categories = getCategories(ma, onDiskVMAddrConverter);
- // TODO: protocols
- std::optional<Node> selrefs = getSelRefs(ma, onDiskVMAddrConverter);
-
- // Skip emitting images with no objc data
- if (!classes.has_value() && !categories.has_value() && !selrefs.has_value())
- return;
- if (classes.has_value())
- imageRecord.map["classes"] = classes.value();
- if (categories.has_value())
- imageRecord.map["categories"] = categories.value();
- if (selrefs.has_value())
- imageRecord.map["selrefs"] = selrefs.value();
-
- dyld3::json::streamArrayNode(needsComma, imageRecord);
- }
- });
- });
-
- dyld3::json::streamArrayEnd(needsComma);
- }
- else if ( options.mode == modeObjCSelectors ) {
- if ( dyldCache->objcOpt() == nullptr ) {
- fprintf(stderr, "Error: could not get optimized objc\n");
- return 1;
- }
- const objc::SelectorHashTable* selectors = dyldCache->objcOpt()->selectorOpt();
- if ( selectors == nullptr ) {
- fprintf(stderr, "Error: could not get optimized objc selectors\n");
- return 1;
- }
-
- __block std::vector<const char*> selNames;
- selectors->forEachString(^(const char *str) {
- selNames.push_back(str);
- });
-
- std::sort(selNames.begin(), selNames.end(),
- [](const char* a, const char* b) {
- // Sort by offset, not string value
- return a < b;
- });
-
- dyld3::json::Node root;
- for (const char* selName : selNames) {
- dyld3::json::Node selNode;
- selNode.map["selectorName"] = dyld3::json::Node{selName};
- selNode.map["offset"] = dyld3::json::Node{(int64_t)selName - (int64_t)dyldCache};
-
- root.array.push_back(selNode);
- }
-
- dyld3::json::printJSON(root, 0, std::cout);
- }
- else if ( options.mode == modeSwiftProtocolConformances ) {
-#if 0
- // This would dump the conformances in each binary, not the table in the shared cache
- dyldCache->forEachImage(^(const mach_header *mh, const char *installName) {
- const dyld3::MachOAnalyzer* ma = (const dyld3::MachOAnalyzer*)mh;
-
- Diagnostics diag;
- bool contentRebased = (sharedCachePath == nullptr);
- auto vmAddrConverter = dyldCache->makeVMAddrConverter(contentRebased);
- uint64_t binaryCacheOffset = (uint64_t)ma - (uint64_t)dyldCache;
- ma->forEachSwiftProtocolConformance(diag, vmAddrConverter,
- ^(uint64_t protocolConformanceRuntimeOffset, const dyld3::MachOAnalyzer::SwiftProtocolConformance &protocolConformance, bool &stopProtocolConformance) {
- printf("(0x%08llx, 0x%08llx) -> 0x%08llx %s\n",
- binaryCacheOffset + protocolConformance.typeConformanceRuntimeOffset, binaryCacheOffset + protocolConformance.protocolRuntimeOffset,
- binaryCacheOffset + protocolConformanceRuntimeOffset, installName);
- });
- });
-#endif
-
- auto getLibraryLeafName = [](const char* path)
- {
- const char* start = strrchr(path, '/');
- if ( start != NULL )
- return &start[1];
- else
- return path;
- };
-
- // Find all the symbols. This maps from VM Addresses to symbol name
- __block std::unordered_map<uint64_t, std::string_view> symbols;
- __block std::unordered_map<uint64_t, std::string_view> dylibs;
- dyldCache->forEachImage(^(const mach_header *mh, const char *installName) {
- const dyld3::MachOAnalyzer* ma = (const dyld3::MachOAnalyzer*)mh;
- Diagnostics diag;
- ma->forEachGlobalSymbol(diag, ^(const char *symbolName, uint64_t n_value, uint8_t n_type, uint8_t n_sect, uint16_t n_desc, bool &stop) {
- symbols[n_value] = symbolName;
- dylibs[n_value] = getLibraryLeafName(installName);
- });
- ma->forEachLocalSymbol(diag, ^(const char *symbolName, uint64_t n_value, uint8_t n_type, uint8_t n_sect, uint16_t n_desc, bool &stop) {
- symbols[n_value] = symbolName;
- dylibs[n_value] = getLibraryLeafName(installName);
- });
- });
-
-#if 0
- // FIXME: Move to the new code for unmapped locals
- if ( (sharedCachePath != nullptr) && dyldCache->hasLocalSymbolsInfo() ) {
- // When mapping the cache from disk, we can also get the unmapped locals
- struct stat statbuf;
- if ( ::stat(sharedCachePath, &statbuf) ) {
- fprintf(stderr, "Error: stat failed for dyld shared cache at %s\n", sharedCachePath);
- return 1;
- }
-
- int cache_fd = ::open(sharedCachePath, O_RDONLY);
- if (cache_fd < 0) {
- fprintf(stderr, "Error: failed to open shared cache file at %s\n", sharedCachePath);
- return 1;
- }
-
- const void* mappedData = ::mmap(NULL, statbuf.st_size, PROT_READ, MAP_PRIVATE, cache_fd, 0);
- if ( mappedData == MAP_FAILED ) {
- fprintf(stderr, "Error: Shared cache not mmap()able\b");
- ::close(cache_fd);
- return 1;
- }
- ::close(cache_fd);
-
- const DyldSharedCache* localsCache = (const DyldSharedCache*)mappedData;
-
- const bool is64 = (strstr(localsCache->archName(), "64") != NULL);
- const uint32_t nlistFileOffset = (uint32_t)((uint8_t*)localsCache->getLocalNlistEntries() - (uint8_t*)dyldCache);
- const char* localStrings = localsCache->getLocalStrings();
-
- __block uint32_t entriesCount = 0;
- localsCache->forEachLocalSymbolEntry(^(uint32_t dylibOffset, uint32_t nlistStartIndex, uint32_t nlistCount, bool &stop) {
- const char* imageName = dyldCache->getIndexedImagePath(entriesCount);
- //printf(" nlistStartIndex=%5d, nlistCount=%5d, image=%s\n", nlistStartIndex, nlistCount, imageName);
- if ( is64 ) {
- const nlist_64* symTab = (nlist_64*)((char*)dyldCache + nlistFileOffset);
- for (int e = 0; e < nlistCount; ++e) {
- const nlist_64* entry = &symTab[nlistStartIndex + e];
- //printf(" nlist[%d].str=%d, %s\n", e, entry->n_un.n_strx, &localStrings[entry->n_un.n_strx]);
- //printf(" nlist[%d].value=0x%0llX\n", e, entry->n_value);
- symbols[entry->n_value] = &localStrings[entry->n_un.n_strx];
- dylibs[entry->n_value] = getLibraryLeafName(imageName);
- }
- }
- entriesCount++;
- });
- }
-#endif
-
- auto getDylibForAddress = ^(uint64_t vmAddress) {
- __block std::string_view dylibName;
- dyldCache->forEachImage(^(const mach_header *mh, const char *installName) {
- if ( !dylibName.empty() )
- return;
- const dyld3::MachOAnalyzer* ma = (const dyld3::MachOAnalyzer*)mh;
- ma->forEachSegment(^(const dyld3::MachOAnalyzer::SegmentInfo &info, bool &stop) {
- if ( (vmAddress >= info.vmAddr) && (vmAddress < (info.vmAddr+info.vmSize)) ) {
- dylibName = installName;
- stop = true;
- }
- });
- });
- return dylibName;
- };
-
- uint64_t cacheBaseAddress = dyldCache->unslidLoadAddress();
-
- const SwiftOptimizationHeader* swiftOptHeader = dyldCache->swiftOpt();
- if ( swiftOptHeader == nullptr ) {
- printf("No Swift optimization information present\n");
- return 0;
- }
- printf("Swift optimization version: %d\n", swiftOptHeader->version);
- if ( swiftOptHeader->version == 1 ) {
- printf("Type hash table\n");
- const SwiftHashTable* typeHashTable = (const SwiftHashTable*)((uint8_t*)dyldCache + swiftOptHeader->typeConformanceHashTableCacheOffset);
- typeHashTable->forEachValue(^(uint32_t bucketIndex, const dyld3::Array<SwiftTypeProtocolConformanceLocation>& impls) {
- for (const SwiftTypeProtocolConformanceLocation& protoLoc : impls) {
- std::string_view typeDesc = "n/a";
- std::string_view typeDescDylib;
- if ( auto it = symbols.find(protoLoc.typeDescriptorCacheOffset + cacheBaseAddress); it != symbols.end() ) {
- typeDesc = it->second;
- typeDescDylib = dylibs[protoLoc.typeDescriptorCacheOffset + cacheBaseAddress];
- } else {
- typeDescDylib = getDylibForAddress(protoLoc.typeDescriptorCacheOffset + cacheBaseAddress);
- if ( typeDescDylib.empty() )
- typeDescDylib = "n/a";
- else
- typeDescDylib = getLibraryLeafName(typeDescDylib.data());
- }
-
- std::string_view protocol = "n/a";
- std::string_view protocolDylib;
- if ( auto it = symbols.find(protoLoc.protocolCacheOffset + cacheBaseAddress); it != symbols.end() ) {
- protocol = it->second;
- protocolDylib = dylibs[protoLoc.protocolCacheOffset + cacheBaseAddress];
- } else {
- protocolDylib = getDylibForAddress(protoLoc.protocolCacheOffset + cacheBaseAddress);
- if ( protocolDylib.empty() )
- protocolDylib = "n/a";
- else
- protocolDylib = getLibraryLeafName(protocolDylib.data());
- }
-
- std::string_view conformance = "n/a";
- std::string_view conformanceDylib;
- if ( auto it = symbols.find(protoLoc.protocolConformanceCacheOffset + cacheBaseAddress); it != symbols.end() ) {
- conformance = it->second;
- conformanceDylib = dylibs[protoLoc.protocolConformanceCacheOffset + cacheBaseAddress];
- } else {
- conformanceDylib = getDylibForAddress(protoLoc.protocolConformanceCacheOffset + cacheBaseAddress);
- if ( conformanceDylib.empty() )
- conformanceDylib = "n/a";
- else
- conformanceDylib = getLibraryLeafName(conformanceDylib.data());
- }
-
- printf("[%d]: (type: %s (cache offset 0x%llx) in %s, protocol %s (cache offset 0x%llx) in %s) -> (conformance: %s (cache offset 0x%llx) in %s)\n",
- bucketIndex,
- typeDesc.data(), protoLoc.typeDescriptorCacheOffset, typeDescDylib.data(),
- protocol.data(), protoLoc.protocolCacheOffset, protocolDylib.data(),
- conformance.data(), protoLoc.protocolConformanceCacheOffset, conformanceDylib.data());
- }
- });
-
- printf("Metadata hash table\n");
- const SwiftHashTable* metadataHashTable = (const SwiftHashTable*)((uint8_t*)dyldCache + swiftOptHeader->metadataConformanceHashTableCacheOffset);
- metadataHashTable->forEachValue(^(uint32_t bucketIndex, const dyld3::Array<SwiftMetadataProtocolConformanceLocation>& impls) {
- for (const SwiftMetadataProtocolConformanceLocation& protoLoc : impls) {
- std::string_view metadataDesc = "n/a";
- std::string_view metadataDescDylib;
- if ( auto it = symbols.find(protoLoc.metadataCacheOffset + cacheBaseAddress); it != symbols.end() ) {
- metadataDesc = it->second;
- metadataDescDylib = dylibs[protoLoc.metadataCacheOffset + cacheBaseAddress];
- } else {
- metadataDescDylib = getDylibForAddress(protoLoc.metadataCacheOffset + cacheBaseAddress);
- if ( metadataDescDylib.empty() )
- metadataDescDylib = "n/a";
- else
- metadataDescDylib = getLibraryLeafName(metadataDescDylib.data());
- }
-
- std::string_view protocol = "n/a";
- std::string_view protocolDylib;
- if ( auto it = symbols.find(protoLoc.protocolCacheOffset + cacheBaseAddress); it != symbols.end() ) {
- protocol = it->second;
- protocolDylib = dylibs[protoLoc.protocolCacheOffset + cacheBaseAddress];
- } else {
- protocolDylib = getDylibForAddress(protoLoc.protocolCacheOffset + cacheBaseAddress);
- if ( protocolDylib.empty() )
- protocolDylib = "n/a";
- else
- protocolDylib = getLibraryLeafName(protocolDylib.data());
- }
-
- std::string_view conformance = "n/a";
- std::string_view conformanceDylib;
- if ( auto it = symbols.find(protoLoc.protocolConformanceCacheOffset + cacheBaseAddress); it != symbols.end() ) {
- conformance = it->second;
- conformanceDylib = dylibs[protoLoc.protocolConformanceCacheOffset + cacheBaseAddress];
- } else {
- conformanceDylib = getDylibForAddress(protoLoc.protocolConformanceCacheOffset + cacheBaseAddress);
- if ( conformanceDylib.empty() )
- conformanceDylib = "n/a";
- else
- conformanceDylib = getLibraryLeafName(conformanceDylib.data());
- }
-
- printf("[%d]: (metadata: %s (cache offset 0x%llx) in %s, protocol %s (cache offset 0x%llx) in %s) -> (conformance: %s (cache offset 0x%llx) in %s)\n",
- bucketIndex,
- metadataDesc.data(), protoLoc.metadataCacheOffset, metadataDescDylib.data(),
- protocol.data(), protoLoc.protocolCacheOffset, protocolDylib.data(),
- conformance.data(), protoLoc.protocolConformanceCacheOffset, conformanceDylib.data());
- }
- });
-
- printf("Foreign type hash table\n");
- const SwiftHashTable* foreignTypeHashTable = (const SwiftHashTable*)((uint8_t*)dyldCache + swiftOptHeader->foreignTypeConformanceHashTableCacheOffset);
- foreignTypeHashTable->forEachValue(^(uint32_t bucketIndex, const dyld3::Array<SwiftForeignTypeProtocolConformanceLocation>& impls) {
- for (const SwiftForeignTypeProtocolConformanceLocation& protoLoc : impls) {
- std::string_view typeNameView((const char*)dyldCache + protoLoc.foreignDescriptorNameCacheOffset, protoLoc.foreignDescriptorNameLength);
- std::string typeName;
- if ( typeNameView.size() != strlen(typeNameView.data()) ) {
- typeName.reserve(typeNameView.size());
- for (const char c : typeNameView) {
- if ( c == '\0' )
- typeName += "\\0";
- else
- typeName += c;
- }
- typeNameView = typeName;
- }
-;
- std::string_view protocol = "n/a";
- std::string_view protocolDylib;
- if ( auto it = symbols.find(protoLoc.protocolCacheOffset + cacheBaseAddress); it != symbols.end() ) {
- protocol = it->second;
- protocolDylib = dylibs[protoLoc.protocolCacheOffset + cacheBaseAddress];
- } else {
- protocolDylib = getDylibForAddress(protoLoc.protocolCacheOffset + cacheBaseAddress);
- if ( protocolDylib.empty() )
- protocolDylib = "n/a";
- else
- protocolDylib = getLibraryLeafName(protocolDylib.data());
- }
-
- std::string_view conformance = "n/a";
- std::string_view conformanceDylib;
- if ( auto it = symbols.find(protoLoc.protocolConformanceCacheOffset + cacheBaseAddress); it != symbols.end() ) {
- conformance = it->second;
- conformanceDylib = dylibs[protoLoc.protocolConformanceCacheOffset + cacheBaseAddress];
- } else {
- conformanceDylib = getDylibForAddress(protoLoc.protocolConformanceCacheOffset + cacheBaseAddress);
- if ( conformanceDylib.empty() )
- conformanceDylib = "n/a";
- else
- conformanceDylib = getLibraryLeafName(conformanceDylib.data());
- }
-
- printf("[%d]: (type name: %s (cache offset 0x%llx), protocol %s (cache offset 0x%llx) in %s) -> (conformance: %s (cache offset 0x%llx) in %s)\n",
- bucketIndex,
- typeName.data(), protoLoc.foreignDescriptorNameCacheOffset,
- protocol.data(), protoLoc.protocolCacheOffset, protocolDylib.data(),
- conformance.data(), protoLoc.protocolConformanceCacheOffset, conformanceDylib.data());
- }
- });
- } else {
- printf("Unhandled version\n");
- }
- }
- else if ( options.mode == modeExtract ) {
- return dyld_shared_cache_extract_dylibs(sharedCachePath, options.extractionDir);
- }
- else if ( options.mode == modeObjCImpCaches ) {
- if (sharedCachePath == nullptr) {
- fprintf(stderr, "Cannot emit imp caches with live cache. Run again with the path to the cache file\n");
- return 1;
- }
- __block std::map<uint64_t, const char*> methodToClassMap;
- __block std::map<uint64_t, const char*> classVMAddrToNameMap;
- const bool contentRebased = false;
- const uint32_t pointerSize = 8;
-
- // Get the base pointers from the magic section in objc
- __block uint64_t objcCacheOffsetsSize = 0;
- __block const void* objcCacheOffsets = nullptr;
- __block Diagnostics diag;
- dyldCache->forEachImage(^(const mach_header* mh, const char* installName) {
- if ( !strcmp(installName, "/usr/lib/libobjc.A.dylib") ) {
- const dyld3::MachOAnalyzer* ma = (const dyld3::MachOAnalyzer*)mh;
- objcCacheOffsets = ma->findSectionContent("__DATA_CONST", "__objc_scoffs", objcCacheOffsetsSize);
- }
- });
-
- if ( objcCacheOffsets == nullptr ) {
- fprintf(stderr, "Unable to print imp-caches as cannot find __DATA_CONST __objc_scoffs inside /usr/lib/libobjc.A.dylib\n");
- return 1;
- }
-
- if ( objcCacheOffsetsSize < (4 * pointerSize) ) {
- fprintf(stderr, "Unable to print imp-caches as __DATA_CONST __objc_scoffs is too small (%lld vs required %u)\n", objcCacheOffsetsSize, (4 * pointerSize));
- return 1;
- }
-
- dyld3::MachOAnalyzer::VMAddrConverter vmAddrConverter = dyldCache->makeVMAddrConverter(contentRebased);
-
- uint64_t selectorStringVMAddrStart = vmAddrConverter.convertToVMAddr(((uint64_t*)objcCacheOffsets)[0]);
- uint64_t selectorStringVMAddrEnd = vmAddrConverter.convertToVMAddr(((uint64_t*)objcCacheOffsets)[1]);
-
- uint64_t sharedCacheRelativeSelectorBaseVMAddress = dyldCache->sharedCacheRelativeSelectorBaseVMAddress();
-
- dyldCache->forEachImage(^(const mach_header *mh, const char *installName) {
- if (diag.hasError())
- return;
-
- const dyld3::MachOAnalyzer* ma = (const dyld3::MachOAnalyzer*)mh;
- intptr_t slide = ma->getSlide();
-
- auto visitClass = ^(uint64_t classVMAddr,
- uint64_t classSuperclassVMAddr,
- uint64_t classDataVMAddr,
- const dyld3::MachOAnalyzer::ObjCClassInfo& objcClass,
- bool isMetaClass,
- bool& stopClass) {
- const char* className = (const char*)objcClass.nameVMAddr(pointerSize) + slide;
- classVMAddrToNameMap[classVMAddr] = className;
- ma->forEachObjCMethod(objcClass.baseMethodsVMAddr(pointerSize), vmAddrConverter,
- sharedCacheRelativeSelectorBaseVMAddress,
- ^(uint64_t methodVMAddr, const dyld3::MachOAnalyzer::ObjCMethod& method, bool& stopMethod) {
- // const char* methodName = (const char*)(method.nameVMAddr + slide);
- methodToClassMap[method.impVMAddr] = className;
- });
- };
- ma->forEachObjCClass(diag, vmAddrConverter, visitClass);
-
- auto visitCategory = ^(uint64_t categoryVMAddr, const dyld3::MachOAnalyzer::ObjCCategory& objcCategory, bool& stopCategory) {
- ma->forEachObjCMethod(objcCategory.instanceMethodsVMAddr, vmAddrConverter,
- sharedCacheRelativeSelectorBaseVMAddress,
- ^(uint64_t methodVMAddr, const dyld3::MachOAnalyzer::ObjCMethod& method, bool& stopMethod) {
- const char* catName = (const char*)objcCategory.nameVMAddr + slide;
- // const char* methodName = (const char*)(method.nameVMAddr + slide);
- methodToClassMap[method.impVMAddr] = catName;
- });
-
- ma->forEachObjCMethod(objcCategory.classMethodsVMAddr, vmAddrConverter,
- sharedCacheRelativeSelectorBaseVMAddress,
- ^(uint64_t methodVMAddr, const dyld3::MachOAnalyzer::ObjCMethod& method, bool& stopMethod) {
- const char* catName = (const char*)objcCategory.nameVMAddr + slide;
- // const char* methodName = (const char*)(method.nameVMAddr + slide);
- methodToClassMap[method.impVMAddr] = catName;
- });
- };
- ma->forEachObjCCategory(diag, vmAddrConverter, visitCategory);
- });
- if (diag.hasError())
- return 1;
-
- dyldCache->forEachImage(^(const mach_header *mh, const char *installName) {
- if (diag.hasError())
- return;
-
- const dyld3::MachOAnalyzer* ma = (const dyld3::MachOAnalyzer*)mh;
- intptr_t slide = ma->getSlide();
-
- auto visitClass = ^(uint64_t classVMAddr,
- uint64_t classSuperclassVMAddr,
- uint64_t classDataVMAddr,
- const dyld3::MachOAnalyzer::ObjCClassInfo& objcClass,
- bool isMetaClass,
- bool& stopClass) {
- const char* type = "class";
- if (isMetaClass)
- type = "meta-class";
- const char* className = (const char*)objcClass.nameVMAddr(pointerSize) + slide;
-
- if (objcClass.methodCacheVMAddr == 0) {
- printf("%s (%s): empty\n", className, type);
- return;
- }
-
- struct Bucket {
- uint32_t selOffset;
- uint32_t impOffset;
- };
- struct ImpCache {
- int32_t fallback_class_offset;
- uint32_t cache_shift : 5;
- uint32_t cache_mask : 11;
- uint32_t occupied : 14;
- uint32_t has_inlines : 1;
- uint32_t bit_one : 1;
- struct Bucket buckets[];
- };
-
- const ImpCache* impCache = (const ImpCache*)(objcClass.methodCacheVMAddr + slide);
- printf("%s (%s): %d buckets\n", className, type, impCache->cache_mask + 1);
-
- if ((classVMAddr + impCache->fallback_class_offset) != objcClass.superclassVMAddr) {
- printf("Flattening fallback: %s\n", classVMAddrToNameMap[classVMAddr + impCache->fallback_class_offset]);
- }
- // Buckets are a 32-bit offset from the impcache itself
- for (uint32_t i = 0; i <= impCache->cache_mask ; ++i) {
- const Bucket& b = impCache->buckets[i];
- uint64_t sel = (uint64_t)b.selOffset + selectorStringVMAddrStart;
- uint64_t imp = classVMAddr - (uint64_t)b.impOffset;
- if (b.selOffset == 0xFFFFFFFF) {
- // Empty bucket
- printf(" - 0x%016llx: %s\n", 0ULL, "");
- } else {
- assert(sel < selectorStringVMAddrEnd);
-
- auto it = methodToClassMap.find(imp);
- if (it == methodToClassMap.end()) {
- fprintf(stderr, "Could not find IMP %llx (for %s)\n", imp, (const char*)(sel + slide));
- }
- assert(it != methodToClassMap.end());
- printf(" - 0x%016llx: %s (from %s)\n", imp, (const char*)(sel + slide), it->second);
- }
- }
- };
- ma->forEachObjCClass(diag, vmAddrConverter, visitClass);
- });
- } else {
- switch ( options.mode ) {
- case modeList: {
- // list all dylibs, including their aliases (symlinks to them) with option vmaddr
- __block std::vector<std::unordered_set<std::string>> indexToPaths;
- __block std::vector<uint64_t> indexToAddr;
- __block std::vector<std::string> indexToUUID;
- dyldCache->forEachImageTextSegment(^(uint64_t loadAddressUnslid, uint64_t textSegmentSize, const unsigned char* dylibUUID, const char* installName, bool& stop) {
- std::unordered_set<std::string> empty;
- if ( options.printVMAddrs )
- indexToAddr.push_back(loadAddressUnslid);
- if ( options.printUUIDs ) {
- uuid_string_t uuidString;
- uuid_unparse_upper(dylibUUID, uuidString);
- indexToUUID.push_back(uuidString);
- }
- indexToPaths.push_back(empty);
- indexToPaths.back().insert(installName);
- });
- dyldCache->forEachDylibPath(^(const char* dylibPath, uint32_t index) {
- indexToPaths[index].insert(dylibPath);
- });
- int index = 0;
- for (const std::unordered_set<std::string>& paths : indexToPaths) {
- for (const std::string& path: paths) {
- if ( options.printVMAddrs )
- printf("0x%08llX ", indexToAddr[index]);
- if ( options.printUUIDs )
- printf("<%s> ", indexToUUID[index].c_str());
- printf("%s\n", path.c_str());
- }
- ++index;
- }
- break;
- }
- case modeListDylibsWithSection: {
- dyldCache->forEachImage(^(const mach_header* mh, const char* installName) {
- dyld3::MachOFile* mf = (dyld3::MachOFile*)mh;
- mf->forEachSection(^(const dyld3::MachOFile::SectionInfo& sectInfo, bool malformedSectionRange, bool& stop) {
- if ( (strcmp(sectInfo.sectName, options.sectionName) == 0) && (strcmp(sectInfo.segInfo.segName, options.segmentName) == 0) ) {
- printf("%s\n", installName);
- stop = true;
- }
- });
- });
- break;
- }
- case modeMap: {
- __block std::map<uint64_t, const char*> dataSegNames;
- __block std::map<uint64_t, uint64_t> dataSegEnds;
- dyldCache->forEachImage(^(const mach_header* mh, const char* installName) {
- dyld3::MachOFile* mf = (dyld3::MachOFile*)mh;
- mf->forEachSegment(^(const dyld3::MachOAnalyzer::SegmentInfo &info, bool &stop) {
- printf("0x%08llX - 0x%08llX %s %s\n", info.vmAddr, info.vmAddr + info.vmSize, info.segName, installName);
- if ( strncmp(info.segName, "__DATA", 6) == 0 ) {
- dataSegNames[info.vmAddr] = installName;
- dataSegEnds[info.vmAddr] = info.vmAddr + info.vmSize;
- }
- });
- });
- // <rdar://problem/51084507> Enhance dyld_shared_cache_util to show where section alignment added padding
- uint64_t lastEnd = 0;
- for (const auto& entry : dataSegEnds) {
- uint64_t padding = entry.first - lastEnd;
- if ( (padding > 32) && (lastEnd != 0) ) {
- printf("0x%08llX - 0x%08llX PADDING %lluKB\n", lastEnd, entry.first, padding/1024);
- }
- lastEnd = entry.second;
- }
- break;
- }
- case modeDependencies: {
- __block bool dependentTargetFound = false;
- dyldCache->forEachImage(^(const mach_header* mh, const char* installName) {
- if ( strcmp(options.dependentsOfPath, installName) != 0 )
- return;
- dependentTargetFound = true;
-
- auto printDep = [&options](const char *loadPath, uint32_t compatVersion, uint32_t curVersion) {
- if ( options.printDylibVersions ) {
- uint32_t compat_vers = compatVersion;
- uint32_t current_vers = curVersion;
- printf("\t%s", loadPath);
- if ( compat_vers != 0xFFFFFFFF ) {
- printf("(compatibility version %u.%u.%u, current version %u.%u.%u)\n",
- (compat_vers >> 16),
- (compat_vers >> 8) & 0xff,
- (compat_vers) & 0xff,
- (current_vers >> 16),
- (current_vers >> 8) & 0xff,
- (current_vers) & 0xff);
- }
- else {
- printf("\n");
- }
- }
- else {
- printf("\t%s\n", loadPath);
- }
- };
-
- dyld3::MachOFile* mf = (dyld3::MachOFile*)mh;
-
- // First print out our dylib and version.
- const char* dylibInstallName;
- uint32_t currentVersion;
- uint32_t compatVersion;
- if ( mf->getDylibInstallName(&dylibInstallName, &compatVersion, ¤tVersion) ) {
- printDep(dylibInstallName, compatVersion, currentVersion);
- }
-
- // Then the dependent dylibs.
- mf->forEachDependentDylib(^(const char* depPath, bool isWeak, bool isReExport, bool isUpward, uint32_t cpatVersion, uint32_t curVersion, bool& stop) {
- printDep(depPath, cpatVersion, curVersion);
- });
- });
- if (options.dependentsOfPath && !dependentTargetFound) {
- fprintf(stderr, "Error: could not find '%s' in the shared cache at\n %s\n", options.dependentsOfPath, sharedCachePath);
- exit(1);
- }
- break;
- }
- case modeLinkEdit: {
- std::map<uint32_t, const char*> pageToContent;
- auto add_linkedit = [&pageToContent](uint32_t pageStart, uint32_t pageEnd, const char* message) {
- for (uint32_t p = pageStart; p <= pageEnd; p += 4096) {
- std::map<uint32_t, const char*>::iterator pos = pageToContent.find(p);
- if ( pos == pageToContent.end() ) {
- pageToContent[p] = strdup(message);
- }
- else {
- const char* oldMessage = pos->second;
- char* newMesssage;
- asprintf(&newMesssage, "%s, %s", oldMessage, message);
- pageToContent[p] = newMesssage;
- ::free((void*)oldMessage);
- }
- }
- };
-
- dyldCache->forEachImage(^(const mach_header* mh, const char* installName) {
- dyld3::MachOAnalyzer* ma = (dyld3::MachOAnalyzer*)mh;
- Diagnostics diag;
- dyld3::MachOAnalyzer::LinkEditInfo leInfo;
- ma->getLinkEditPointers(diag, leInfo);
-
- if (diag.hasError())
- return;
-
- char message[1000];
- const char* shortName = strrchr(installName, '/') + 1;
-
- if ( leInfo.dyldInfo != nullptr ) {
- // add export trie info
- if ( leInfo.dyldInfo->export_size != 0 ) {
- //printf("export_off=0x%X\n", leInfo.dyldInfo->export_off());
- uint32_t exportPageOffsetStart = leInfo.dyldInfo->export_off & (-4096);
- uint32_t exportPageOffsetEnd = (leInfo.dyldInfo->export_off + leInfo.dyldInfo->export_size) & (-4096);
- sprintf(message, "exports from %s", shortName);
- add_linkedit(exportPageOffsetStart, exportPageOffsetEnd, message);
- }
- // add binding info
- if ( leInfo.dyldInfo->bind_size != 0 ) {
- uint32_t bindPageOffsetStart = leInfo.dyldInfo->bind_off & (-4096);
- uint32_t bindPageOffsetEnd = (leInfo.dyldInfo->bind_off + leInfo.dyldInfo->bind_size) & (-4096);
- sprintf(message, "bindings from %s", shortName);
- add_linkedit(bindPageOffsetStart, bindPageOffsetEnd, message);
- }
- // add lazy binding info
- if ( leInfo.dyldInfo->lazy_bind_size != 0 ) {
- uint32_t lazybindPageOffsetStart = leInfo.dyldInfo->lazy_bind_off & (-4096);
- uint32_t lazybindPageOffsetEnd = (leInfo.dyldInfo->lazy_bind_off + leInfo.dyldInfo->lazy_bind_size) & (-4096);
- sprintf(message, "lazy bindings from %s", shortName);
- add_linkedit(lazybindPageOffsetStart, lazybindPageOffsetEnd, message);
- }
- // add weak binding info
- if ( leInfo.dyldInfo->weak_bind_size != 0 ) {
- uint32_t weakbindPageOffsetStart = leInfo.dyldInfo->weak_bind_off & (-4096);
- uint32_t weakbindPageOffsetEnd = (leInfo.dyldInfo->weak_bind_off + leInfo.dyldInfo->weak_bind_size) & (-4096);
- sprintf(message, "weak bindings from %s", shortName);
- add_linkedit(weakbindPageOffsetStart, weakbindPageOffsetEnd, message);
- }
- } else {
- // add export trie info
- if ( (leInfo.exportsTrie != nullptr) && (leInfo.exportsTrie->datasize != 0) ) {
- //printf("export_off=0x%X\n", leInfo.exportsTrie->export_off());
- uint32_t exportPageOffsetStart = leInfo.exportsTrie->dataoff & (-4096);
- uint32_t exportPageOffsetEnd = (leInfo.exportsTrie->dataoff + leInfo.exportsTrie->datasize) & (-4096);
- sprintf(message, "exports from %s", shortName);
- add_linkedit(exportPageOffsetStart, exportPageOffsetEnd, message);
- }
- // Chained fixups are stripped from cache binaries, so no need to check for them here
- }
- });
-
- for (std::map<uint32_t, const char*>::iterator it = pageToContent.begin(); it != pageToContent.end(); ++it) {
- printf("0x%08X %s\n", it->first, it->second);
- }
- break;
- }
- case modeSize: {
- struct TextInfo {
- uint64_t textSize;
- const char* path;
- };
- __block std::vector<TextInfo> textSegments;
- dyldCache->forEachImage(^(const mach_header* mh, const char* installName) {
-
- dyld3::MachOAnalyzer* ma = (dyld3::MachOAnalyzer*)mh;
- ma->forEachSegment(^(const dyld3::MachOAnalyzer::SegmentInfo &info, bool &stop) {
- if ( strcmp(info.segName, "__TEXT") != 0 )
- return;
- textSegments.push_back({ info.fileSize, installName });
- });
- });
- std::sort(textSegments.begin(), textSegments.end(), [](const TextInfo& left, const TextInfo& right) {
- return (left.textSize > right.textSize);
- });
- for (std::vector<TextInfo>::iterator it = textSegments.begin(); it != textSegments.end(); ++it) {
- printf(" 0x%08llX %s\n", it->textSize, it->path);
- }
- break;
- }
- case modePatchTable: {
- std::vector<SegmentInfo> segInfos;
- buildSegmentInfo(dyldCache, segInfos);
- __block uint32_t imageIndex = 0;
- dyldCache->forEachImage(^(const mach_header* mh, const char* installName) {
- printf("%s:\n", installName);
- uint64_t cacheBaseAddress = dyldCache->unslidLoadAddress();
- uint64_t dylibBaseAddress = ((dyld3::MachOAnalyzer*)mh)->preferredLoadAddress();
- dyldCache->forEachPatchableExport(imageIndex, ^(uint32_t dylibVMOffsetOfImpl, const char* exportName) {
- uint64_t cacheOffsetOfImpl = (dylibBaseAddress + dylibVMOffsetOfImpl) - cacheBaseAddress;
- printf(" export: 0x%08llX %s\n", cacheOffsetOfImpl, exportName);
- dyldCache->forEachPatchableUseOfExport(imageIndex, dylibVMOffsetOfImpl,
- ^(uint32_t userImageIndex, uint32_t userVMOffset,
- dyld3::MachOLoaded::PointerMetaData pmd, uint64_t addend) {
- // Get the image so that we can convert from dylib offset to cache offset
- uint64_t mTime;
- uint64_t inode;
- const dyld3::MachOAnalyzer* imageMA = (dyld3::MachOAnalyzer*)(dyldCache->getIndexedImageEntry(userImageIndex, mTime, inode));
- if ( imageMA == nullptr )
- return;
-
- SegmentInfo usageAt;
- const uint64_t patchLocVmAddr = imageMA->preferredLoadAddress() + userVMOffset;
- const uint64_t patchLocCacheOffset = patchLocVmAddr - cacheBaseAddress;
- findImageAndSegment(dyldCache, segInfos, patchLocCacheOffset, &usageAt);
-
- // Verify that findImage and the callback image match
- std::string_view userInstallName = imageMA->installName();
- assert(userInstallName == usageAt.installName);
-
- if ( addend == 0 )
- printf(" used by: %s+0x%04llX in %s\n", usageAt.segName, patchLocVmAddr-usageAt.vmAddr, usageAt.installName);
- else
- printf(" used by: %s+0x%04llX (addend=%lld) in %s\n", usageAt.segName, patchLocVmAddr-usageAt.vmAddr, addend, usageAt.installName);
- });
- });
- ++imageIndex;
- });
- break;
- }
- case modeNone:
- case modeInfo:
- case modeSlideInfo:
- case modeVerboseSlideInfo:
- case modeTextInfo:
- case modeLocalSymbols:
- case modeJSONMap:
- case modeJSONDependents:
- case modeSectionSizes:
- case modeStrings:
- case modeObjCInfo:
- case modeObjCProtocols:
- case modeObjCImpCaches:
- case modeObjCClasses:
- case modeObjCSelectors:
- case modeSwiftProtocolConformances:
- case modeExtract:
- break;
- }
- }
- return 0;
-}